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Finding the Fourth Proportional to 672.03, 927.45 and 392.31

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Solution

The fourth proportional to 672.03, 927.45 and 392.31 is: 541.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.03 : 927.45 = 392.31 : x
  2. Step 2: Convert to fraction form
    672.03/927.45 = 392.31/x
  3. Step 3: Cross multiply
    672.03x = 927.45 × 392.31
  4. Step 4: Simplify right side
    672.03x = 363,847.91
  5. Step 5: Solve for x
    x = 363,847.91/672.03
  6. Step 6: Final answer
    x = 541.42

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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.