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Finding the Fourth Proportional to 1,042.72, 1,439.10 and 600.61

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Solution

The fourth proportional to 1,042.72, 1,439.10 and 600.61 is: 828.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.72 : 1,439.10 = 600.61 : x
  2. Step 2: Convert to fraction form
    1,042.72/1,439.10 = 600.61/x
  3. Step 3: Cross multiply
    1,042.72x = 1,439.10 × 600.61
  4. Step 4: Simplify right side
    1,042.72x = 864,330.66
  5. Step 5: Solve for x
    x = 864,330.66/1,042.72
  6. Step 6: Final answer
    x = 828.92

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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.