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Finding the Fourth Proportional to 621.54, 932.01 and 210.55

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Solution

The fourth proportional to 621.54, 932.01 and 210.55 is: 315.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.54 : 932.01 = 210.55 : x
  2. Step 2: Convert to fraction form
    621.54/932.01 = 210.55/x
  3. Step 3: Cross multiply
    621.54x = 932.01 × 210.55
  4. Step 4: Simplify right side
    621.54x = 196,234.71
  5. Step 5: Solve for x
    x = 196,234.71/621.54
  6. Step 6: Final answer
    x = 315.72

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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.