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Finding the Fourth Proportional to 257.96, 386.91 and 93.44

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Solution

The fourth proportional to 257.96, 386.91 and 93.44 is: 140.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.96 : 386.91 = 93.44 : x
  2. Step 2: Convert to fraction form
    257.96/386.91 = 93.44/x
  3. Step 3: Cross multiply
    257.96x = 386.91 × 93.44
  4. Step 4: Simplify right side
    257.96x = 36,152.87
  5. Step 5: Solve for x
    x = 36,152.87/257.96
  6. Step 6: Final answer
    x = 140.15

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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.