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Finding the Fourth Proportional to 621.60, 932.42 and 210.76

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Solution

The fourth proportional to 621.60, 932.42 and 210.76 is: 316.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.60 : 932.42 = 210.76 : x
  2. Step 2: Convert to fraction form
    621.60/932.42 = 210.76/x
  3. Step 3: Cross multiply
    621.60x = 932.42 × 210.76
  4. Step 4: Simplify right side
    621.60x = 196,516.84
  5. Step 5: Solve for x
    x = 196,516.84/621.60
  6. Step 6: Final answer
    x = 316.15

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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.