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Finding the Fourth Proportional to 230.27, 345.32 and 91.40

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Solution

The fourth proportional to 230.27, 345.32 and 91.40 is: 137.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.27 : 345.32 = 91.40 : x
  2. Step 2: Convert to fraction form
    230.27/345.32 = 91.40/x
  3. Step 3: Cross multiply
    230.27x = 345.32 × 91.40
  4. Step 4: Simplify right side
    230.27x = 31,561.79
  5. Step 5: Solve for x
    x = 31,561.79/230.27
  6. Step 6: Final answer
    x = 137.06

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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.