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Finding the Fourth Proportional to 462.62, 693.94 and 257.16

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Solution

The fourth proportional to 462.62, 693.94 and 257.16 is: 385.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.62 : 693.94 = 257.16 : x
  2. Step 2: Convert to fraction form
    462.62/693.94 = 257.16/x
  3. Step 3: Cross multiply
    462.62x = 693.94 × 257.16
  4. Step 4: Simplify right side
    462.62x = 178,453.61
  5. Step 5: Solve for x
    x = 178,453.61/462.62
  6. Step 6: Final answer
    x = 385.75

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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.