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Finding the Fourth Proportional to 265.06, 397.54 and 91.72

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Solution

The fourth proportional to 265.06, 397.54 and 91.72 is: 137.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.06 : 397.54 = 91.72 : x
  2. Step 2: Convert to fraction form
    265.06/397.54 = 91.72/x
  3. Step 3: Cross multiply
    265.06x = 397.54 × 91.72
  4. Step 4: Simplify right side
    265.06x = 36,462.37
  5. Step 5: Solve for x
    x = 36,462.37/265.06
  6. Step 6: Final answer
    x = 137.56

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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.