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Finding the Fourth Proportional to 621.80, 932.69 and 251.77

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Solution

The fourth proportional to 621.80, 932.69 and 251.77 is: 377.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.80 : 932.69 = 251.77 : x
  2. Step 2: Convert to fraction form
    621.80/932.69 = 251.77/x
  3. Step 3: Cross multiply
    621.80x = 932.69 × 251.77
  4. Step 4: Simplify right side
    621.80x = 234,823.36
  5. Step 5: Solve for x
    x = 234,823.36/621.80
  6. Step 6: Final answer
    x = 377.65

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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.