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Finding the Fourth Proportional to 424.54, 585.69 and 256.48

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Solution

The fourth proportional to 424.54, 585.69 and 256.48 is: 353.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.54 : 585.69 = 256.48 : x
  2. Step 2: Convert to fraction form
    424.54/585.69 = 256.48/x
  3. Step 3: Cross multiply
    424.54x = 585.69 × 256.48
  4. Step 4: Simplify right side
    424.54x = 150,217.77
  5. Step 5: Solve for x
    x = 150,217.77/424.54
  6. Step 6: Final answer
    x = 353.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.