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Finding the Fourth Proportional to 621.44, 932.80 and 256.47

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Solution

The fourth proportional to 621.44, 932.80 and 256.47 is: 384.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.44 : 932.80 = 256.47 : x
  2. Step 2: Convert to fraction form
    621.44/932.80 = 256.47/x
  3. Step 3: Cross multiply
    621.44x = 932.80 × 256.47
  4. Step 4: Simplify right side
    621.44x = 239,235.22
  5. Step 5: Solve for x
    x = 239,235.22/621.44
  6. Step 6: Final answer
    x = 384.97

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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.