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Finding the Fourth Proportional to 621.66, 932.63 and 287.94

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Solution

The fourth proportional to 621.66, 932.63 and 287.94 is: 431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.66 : 932.63 = 287.94 : x
  2. Step 2: Convert to fraction form
    621.66/932.63 = 287.94/x
  3. Step 3: Cross multiply
    621.66x = 932.63 × 287.94
  4. Step 4: Simplify right side
    621.66x = 268,542.20
  5. Step 5: Solve for x
    x = 268,542.20/621.66
  6. Step 6: Final answer
    x = 431.98

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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.