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Finding the Fourth Proportional to 238.77, 358.15 and 65.43

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Solution

The fourth proportional to 238.77, 358.15 and 65.43 is: 98.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.77 : 358.15 = 65.43 : x
  2. Step 2: Convert to fraction form
    238.77/358.15 = 65.43/x
  3. Step 3: Cross multiply
    238.77x = 358.15 × 65.43
  4. Step 4: Simplify right side
    238.77x = 23,433.96
  5. Step 5: Solve for x
    x = 23,433.96/238.77
  6. Step 6: Final answer
    x = 98.15

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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.