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Finding the Fourth Proportional to 442,870.80, 664,306.20 and 402,781.20

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Solution

The fourth proportional to 442,870.80, 664,306.20 and 402,781.20 is: 604,171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,870.80 : 664,306.20 = 402,781.20 : x
  2. Step 2: Convert to fraction form
    442,870.80/664,306.20 = 402,781.20/x
  3. Step 3: Cross multiply
    442,870.80x = 664,306.20 × 402,781.20
  4. Step 4: Simplify right side
    442,870.80x = 267,570,048,403.44
  5. Step 5: Solve for x
    x = 267,570,048,403.44/442,870.80
  6. Step 6: Final answer
    x = 604,171.80

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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.