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Finding the Fourth Proportional to 265.76, 398.24 and 238.16

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Solution

The fourth proportional to 265.76, 398.24 and 238.16 is: 356.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.76 : 398.24 = 238.16 : x
  2. Step 2: Convert to fraction form
    265.76/398.24 = 238.16/x
  3. Step 3: Cross multiply
    265.76x = 398.24 × 238.16
  4. Step 4: Simplify right side
    265.76x = 94,844.84
  5. Step 5: Solve for x
    x = 94,844.84/265.76
  6. Step 6: Final answer
    x = 356.88

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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.