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Finding the Fourth Proportional to 348.41, 521.72 and 256.97

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Solution

The fourth proportional to 348.41, 521.72 and 256.97 is: 384.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.41 : 521.72 = 256.97 : x
  2. Step 2: Convert to fraction form
    348.41/521.72 = 256.97/x
  3. Step 3: Cross multiply
    348.41x = 521.72 × 256.97
  4. Step 4: Simplify right side
    348.41x = 134,065.10
  5. Step 5: Solve for x
    x = 134,065.10/348.41
  6. Step 6: Final answer
    x = 384.79

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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.