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Finding the Fourth Proportional to 232.43, 346.65 and 215.15

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Solution

The fourth proportional to 232.43, 346.65 and 215.15 is: 320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.43 : 346.65 = 215.15 : x
  2. Step 2: Convert to fraction form
    232.43/346.65 = 215.15/x
  3. Step 3: Cross multiply
    232.43x = 346.65 × 215.15
  4. Step 4: Simplify right side
    232.43x = 74,579.21
  5. Step 5: Solve for x
    x = 74,579.21/232.43
  6. Step 6: Final answer
    x = 320.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.