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Finding the Fourth Proportional to 348.87, 521.70 and 256.60

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Solution

The fourth proportional to 348.87, 521.70 and 256.60 is: 383.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.87 : 521.70 = 256.60 : x
  2. Step 2: Convert to fraction form
    348.87/521.70 = 256.60/x
  3. Step 3: Cross multiply
    348.87x = 521.70 × 256.60
  4. Step 4: Simplify right side
    348.87x = 133,868.22
  5. Step 5: Solve for x
    x = 133,868.22/348.87
  6. Step 6: Final answer
    x = 383.72

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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.