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Finding the Fourth Proportional to 661,666.60, 992,499.90 and 425,470.60

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Solution

The fourth proportional to 661,666.60, 992,499.90 and 425,470.60 is: 638,205.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,666.60 : 992,499.90 = 425,470.60 : x
  2. Step 2: Convert to fraction form
    661,666.60/992,499.90 = 425,470.60/x
  3. Step 3: Cross multiply
    661,666.60x = 992,499.90 × 425,470.60
  4. Step 4: Simplify right side
    661,666.60x = 422,279,527,952.94
  5. Step 5: Solve for x
    x = 422,279,527,952.94/661,666.60
  6. Step 6: Final answer
    x = 638,205.90

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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.