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Finding the Fourth Proportional to 156.20, 232.45 and 154.58

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Solution

The fourth proportional to 156.20, 232.45 and 154.58 is: 230.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.20 : 232.45 = 154.58 : x
  2. Step 2: Convert to fraction form
    156.20/232.45 = 154.58/x
  3. Step 3: Cross multiply
    156.20x = 232.45 × 154.58
  4. Step 4: Simplify right side
    156.20x = 35,932.12
  5. Step 5: Solve for x
    x = 35,932.12/156.20
  6. Step 6: Final answer
    x = 230.04

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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.