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Finding the Fourth Proportional to 461.87, 691.07 and 256.58

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Solution

The fourth proportional to 461.87, 691.07 and 256.58 is: 383.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.87 : 691.07 = 256.58 : x
  2. Step 2: Convert to fraction form
    461.87/691.07 = 256.58/x
  3. Step 3: Cross multiply
    461.87x = 691.07 × 256.58
  4. Step 4: Simplify right side
    461.87x = 177,316.48
  5. Step 5: Solve for x
    x = 177,316.48/461.87
  6. Step 6: Final answer
    x = 383.91

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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.