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Finding the Fourth Proportional to 622.52, 934.21 and 257.31

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Solution

The fourth proportional to 622.52, 934.21 and 257.31 is: 386.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.52 : 934.21 = 257.31 : x
  2. Step 2: Convert to fraction form
    622.52/934.21 = 257.31/x
  3. Step 3: Cross multiply
    622.52x = 934.21 × 257.31
  4. Step 4: Simplify right side
    622.52x = 240,381.58
  5. Step 5: Solve for x
    x = 240,381.58/622.52
  6. Step 6: Final answer
    x = 386.14

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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.