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Finding the Fourth Proportional to 155.79, 232.20 and 154.51

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Solution

The fourth proportional to 155.79, 232.20 and 154.51 is: 230.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.79 : 232.20 = 154.51 : x
  2. Step 2: Convert to fraction form
    155.79/232.20 = 154.51/x
  3. Step 3: Cross multiply
    155.79x = 232.20 × 154.51
  4. Step 4: Simplify right side
    155.79x = 35,876.64
  5. Step 5: Solve for x
    x = 35,876.64/155.79
  6. Step 6: Final answer
    x = 230.29

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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.