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Finding the Fourth Proportional to 521,640.10, 782,460.15 and 433,066.60

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Solution

The fourth proportional to 521,640.10, 782,460.15 and 433,066.60 is: 649,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,640.10 : 782,460.15 = 433,066.60 : x
  2. Step 2: Convert to fraction form
    521,640.10/782,460.15 = 433,066.60/x
  3. Step 3: Cross multiply
    521,640.10x = 782,460.15 × 433,066.60
  4. Step 4: Simplify right side
    521,640.10x = 338,857,356,795.99
  5. Step 5: Solve for x
    x = 338,857,356,795.99/521,640.10
  6. Step 6: Final answer
    x = 649,599.90

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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.