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Finding the Fourth Proportional to 625.60, 939.24 and 618.28

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Solution

The fourth proportional to 625.60, 939.24 and 618.28 is: 928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.60 : 939.24 = 618.28 : x
  2. Step 2: Convert to fraction form
    625.60/939.24 = 618.28/x
  3. Step 3: Cross multiply
    625.60x = 939.24 × 618.28
  4. Step 4: Simplify right side
    625.60x = 580,713.31
  5. Step 5: Solve for x
    x = 580,713.31/625.60
  6. Step 6: Final answer
    x = 928.25

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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.