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Finding the Fourth Proportional to 622.61, 934.15 and 257.37

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Solution

The fourth proportional to 622.61, 934.15 and 257.37 is: 386.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.61 : 934.15 = 257.37 : x
  2. Step 2: Convert to fraction form
    622.61/934.15 = 257.37/x
  3. Step 3: Cross multiply
    622.61x = 934.15 × 257.37
  4. Step 4: Simplify right side
    622.61x = 240,422.19
  5. Step 5: Solve for x
    x = 240,422.19/622.61
  6. Step 6: Final answer
    x = 386.15

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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.