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Finding the Fourth Proportional to 672.02, 1,008.11 and 631.52

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Solution

The fourth proportional to 672.02, 1,008.11 and 631.52 is: 947.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.02 : 1,008.11 = 631.52 : x
  2. Step 2: Convert to fraction form
    672.02/1,008.11 = 631.52/x
  3. Step 3: Cross multiply
    672.02x = 1,008.11 × 631.52
  4. Step 4: Simplify right side
    672.02x = 636,641.63
  5. Step 5: Solve for x
    x = 636,641.63/672.02
  6. Step 6: Final answer
    x = 947.36

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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.