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Finding the Fourth Proportional to 265.76, 398.08 and 135.37

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Solution

The fourth proportional to 265.76, 398.08 and 135.37 is: 202.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.76 : 398.08 = 135.37 : x
  2. Step 2: Convert to fraction form
    265.76/398.08 = 135.37/x
  3. Step 3: Cross multiply
    265.76x = 398.08 × 135.37
  4. Step 4: Simplify right side
    265.76x = 53,886.10
  5. Step 5: Solve for x
    x = 53,886.10/265.76
  6. Step 6: Final answer
    x = 202.76

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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.