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Finding the Fourth Proportional to 645,338.80, 968,008.20 and 577,687.60

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Solution

The fourth proportional to 645,338.80, 968,008.20 and 577,687.60 is: 866,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,338.80 : 968,008.20 = 577,687.60 : x
  2. Step 2: Convert to fraction form
    645,338.80/968,008.20 = 577,687.60/x
  3. Step 3: Cross multiply
    645,338.80x = 968,008.20 × 577,687.60
  4. Step 4: Simplify right side
    645,338.80x = 559,206,333,838.32
  5. Step 5: Solve for x
    x = 559,206,333,838.32/645,338.80
  6. Step 6: Final answer
    x = 866,531.40

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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.