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Finding the Fourth Proportional to 672.13, 927.21 and 409.69

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Solution

The fourth proportional to 672.13, 927.21 and 409.69 is: 565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.13 : 927.21 = 409.69 : x
  2. Step 2: Convert to fraction form
    672.13/927.21 = 409.69/x
  3. Step 3: Cross multiply
    672.13x = 927.21 × 409.69
  4. Step 4: Simplify right side
    672.13x = 379,868.66
  5. Step 5: Solve for x
    x = 379,868.66/672.13
  6. Step 6: Final answer
    x = 565.17

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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.