Home / 721,654.85-1,083,320.87-422,350.20

Finding the Fourth Proportional to 721,654.85, 1,083,320.87 and 422,350.20

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Solution

The fourth proportional to 721,654.85, 1,083,320.87 and 422,350.20 is: 634,016.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,654.85 : 1,083,320.87 = 422,350.20 : x
  2. Step 2: Convert to fraction form
    721,654.85/1,083,320.87 = 422,350.20/x
  3. Step 3: Cross multiply
    721,654.85x = 1,083,320.87 × 422,350.20
  4. Step 4: Simplify right side
    721,654.85x = 457,540,783,996.92
  5. Step 5: Solve for x
    x = 457,540,783,996.92/721,654.85
  6. Step 6: Final answer
    x = 634,016.08

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Double scale
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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.