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Finding the Fourth Proportional to 627,321,315.80, 940,981,973.70 and 577,156,784.60

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Solution

The fourth proportional to 627,321,315.80, 940,981,973.70 and 577,156,784.60 is: 865,735,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,321,315.80 : 940,981,973.70 = 577,156,784.60 : x
  2. Step 2: Convert to fraction form
    627,321,315.80/940,981,973.70 = 577,156,784.60/x
  3. Step 3: Cross multiply
    627,321,315.80x = 940,981,973.70 × 577,156,784.60
  4. Step 4: Simplify right side
    627,321,315.80x = 543,094,130,307,253,824
  5. Step 5: Solve for x
    x = 543,094,130,307,253,824/627,321,315.80
  6. Step 6: Final answer
    x = 865,735,176.90

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Half scale
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Double scale
Find fourth proportional to 627,321,316.80, 940,981,975.20 and 577,156,785.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.