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Finding the Fourth Proportional to 353,616.47, 488,001.31 and 217,728.83

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Solution

The fourth proportional to 353,616.47, 488,001.31 and 217,728.83 is: 300,472.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,616.47 : 488,001.31 = 217,728.83 : x
  2. Step 2: Convert to fraction form
    353,616.47/488,001.31 = 217,728.83/x
  3. Step 3: Cross multiply
    353,616.47x = 488,001.31 × 217,728.83
  4. Step 4: Simplify right side
    353,616.47x = 106,251,951,280.44
  5. Step 5: Solve for x
    x = 106,251,951,280.44/353,616.47
  6. Step 6: Final answer
    x = 300,472.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.