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Finding the Fourth Proportional to 625.21, 937.32 and 316.78

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Solution

The fourth proportional to 625.21, 937.32 and 316.78 is: 474.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.21 : 937.32 = 316.78 : x
  2. Step 2: Convert to fraction form
    625.21/937.32 = 316.78/x
  3. Step 3: Cross multiply
    625.21x = 937.32 × 316.78
  4. Step 4: Simplify right side
    625.21x = 296,924.23
  5. Step 5: Solve for x
    x = 296,924.23/625.21
  6. Step 6: Final answer
    x = 474.92

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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.