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Finding the Fourth Proportional to 348.50, 523.02 and 257.46

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Solution

The fourth proportional to 348.50, 523.02 and 257.46 is: 386.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.50 : 523.02 = 257.46 : x
  2. Step 2: Convert to fraction form
    348.50/523.02 = 257.46/x
  3. Step 3: Cross multiply
    348.50x = 523.02 × 257.46
  4. Step 4: Simplify right side
    348.50x = 134,656.73
  5. Step 5: Solve for x
    x = 134,656.73/348.50
  6. Step 6: Final answer
    x = 386.39

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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.