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Finding the Fourth Proportional to 625.98, 939.36 and 318.18

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Solution

The fourth proportional to 625.98, 939.36 and 318.18 is: 477.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.98 : 939.36 = 318.18 : x
  2. Step 2: Convert to fraction form
    625.98/939.36 = 318.18/x
  3. Step 3: Cross multiply
    625.98x = 939.36 × 318.18
  4. Step 4: Simplify right side
    625.98x = 298,885.56
  5. Step 5: Solve for x
    x = 298,885.56/625.98
  6. Step 6: Final answer
    x = 477.47

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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.