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Finding the Fourth Proportional to 485,744.62, 728,665.54 and 148,781.38

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Solution

The fourth proportional to 485,744.62, 728,665.54 and 148,781.38 is: 223,186.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,744.62 : 728,665.54 = 148,781.38 : x
  2. Step 2: Convert to fraction form
    485,744.62/728,665.54 = 148,781.38/x
  3. Step 3: Cross multiply
    485,744.62x = 728,665.54 × 148,781.38
  4. Step 4: Simplify right side
    485,744.62x = 108,411,864,599.65
  5. Step 5: Solve for x
    x = 108,411,864,599.65/485,744.62
  6. Step 6: Final answer
    x = 223,186.96

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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.