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Finding the Fourth Proportional to 387.40, 534.68 and 232.16

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Solution

The fourth proportional to 387.40, 534.68 and 232.16 is: 320.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.40 : 534.68 = 232.16 : x
  2. Step 2: Convert to fraction form
    387.40/534.68 = 232.16/x
  3. Step 3: Cross multiply
    387.40x = 534.68 × 232.16
  4. Step 4: Simplify right side
    387.40x = 124,131.31
  5. Step 5: Solve for x
    x = 124,131.31/387.40
  6. Step 6: Final answer
    x = 320.42

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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.