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Finding the Fourth Proportional to 621.81, 932.99 and 256.50

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Solution

The fourth proportional to 621.81, 932.99 and 256.50 is: 384.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.81 : 932.99 = 256.50 : x
  2. Step 2: Convert to fraction form
    621.81/932.99 = 256.50/x
  3. Step 3: Cross multiply
    621.81x = 932.99 × 256.50
  4. Step 4: Simplify right side
    621.81x = 239,310.65
  5. Step 5: Solve for x
    x = 239,310.65/621.81
  6. Step 6: Final answer
    x = 384.86

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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.