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Finding the Fourth Proportional to 672.10, 927.41 and 392.31

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Solution

The fourth proportional to 672.10, 927.41 and 392.31 is: 541.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.10 : 927.41 = 392.31 : x
  2. Step 2: Convert to fraction form
    672.10/927.41 = 392.31/x
  3. Step 3: Cross multiply
    672.10x = 927.41 × 392.31
  4. Step 4: Simplify right side
    672.10x = 363,830.26
  5. Step 5: Solve for x
    x = 363,830.26/672.10
  6. Step 6: Final answer
    x = 541.34

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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.