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Finding the Fourth Proportional to 442,902.90, 664,451.55 and 143,397.30

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Solution

The fourth proportional to 442,902.90, 664,451.55 and 143,397.30 is: 215,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,902.90 : 664,451.55 = 143,397.30 : x
  2. Step 2: Convert to fraction form
    442,902.90/664,451.55 = 143,397.30/x
  3. Step 3: Cross multiply
    442,902.90x = 664,451.55 × 143,397.30
  4. Step 4: Simplify right side
    442,902.90x = 95,280,558,250.82
  5. Step 5: Solve for x
    x = 95,280,558,250.82/442,902.90
  6. Step 6: Final answer
    x = 215,127.42

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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.