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Finding the Fourth Proportional to 238.74, 358.10 and 84.77

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Solution

The fourth proportional to 238.74, 358.10 and 84.77 is: 127.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.74 : 358.10 = 84.77 : x
  2. Step 2: Convert to fraction form
    238.74/358.10 = 84.77/x
  3. Step 3: Cross multiply
    238.74x = 358.10 × 84.77
  4. Step 4: Simplify right side
    238.74x = 30,356.14
  5. Step 5: Solve for x
    x = 30,356.14/238.74
  6. Step 6: Final answer
    x = 127.15

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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.