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Finding the Fourth Proportional to 627,321,329.80, 940,981,994.70 and 577,156,798.60

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Solution

The fourth proportional to 627,321,329.80, 940,981,994.70 and 577,156,798.60 is: 865,735,197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,321,329.80 : 940,981,994.70 = 577,156,798.60 : x
  2. Step 2: Convert to fraction form
    627,321,329.80/940,981,994.70 = 577,156,798.60/x
  3. Step 3: Cross multiply
    627,321,329.80x = 940,981,994.70 × 577,156,798.60
  4. Step 4: Simplify right side
    627,321,329.80x = 543,094,155,601,294,208
  5. Step 5: Solve for x
    x = 543,094,155,601,294,208/627,321,329.80
  6. Step 6: Final answer
    x = 865,735,197.90

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Double scale
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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.