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Finding the Fourth Proportional to 672.17, 1,008.11 and 325.35

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Solution

The fourth proportional to 672.17, 1,008.11 and 325.35 is: 487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.17 : 1,008.11 = 325.35 : x
  2. Step 2: Convert to fraction form
    672.17/1,008.11 = 325.35/x
  3. Step 3: Cross multiply
    672.17x = 1,008.11 × 325.35
  4. Step 4: Simplify right side
    672.17x = 327,989.40
  5. Step 5: Solve for x
    x = 327,989.40/672.17
  6. Step 6: Final answer
    x = 487.96

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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.