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Finding the Fourth Proportional to 521,609.10, 782,413.65 and 255,540.30

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Solution

The fourth proportional to 521,609.10, 782,413.65 and 255,540.30 is: 383,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,609.10 : 782,413.65 = 255,540.30 : x
  2. Step 2: Convert to fraction form
    521,609.10/782,413.65 = 255,540.30/x
  3. Step 3: Cross multiply
    521,609.10x = 782,413.65 × 255,540.30
  4. Step 4: Simplify right side
    521,609.10x = 199,938,218,845.10
  5. Step 5: Solve for x
    x = 199,938,218,845.10/521,609.10
  6. Step 6: Final answer
    x = 383,310.45

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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.