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Finding the Fourth Proportional to 518,909.60, 777,781.20 and 266,092.40

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Solution

The fourth proportional to 518,909.60, 777,781.20 and 266,092.40 is: 398,839.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,909.60 : 777,781.20 = 266,092.40 : x
  2. Step 2: Convert to fraction form
    518,909.60/777,781.20 = 266,092.40/x
  3. Step 3: Cross multiply
    518,909.60x = 777,781.20 × 266,092.40
  4. Step 4: Simplify right side
    518,909.60x = 206,961,666,182.88
  5. Step 5: Solve for x
    x = 206,961,666,182.88/518,909.60
  6. Step 6: Final answer
    x = 398,839.54

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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.