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Finding the Fourth Proportional to 154.99, 232.57 and 143.38

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Solution

The fourth proportional to 154.99, 232.57 and 143.38 is: 215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.99 : 232.57 = 143.38 : x
  2. Step 2: Convert to fraction form
    154.99/232.57 = 143.38/x
  3. Step 3: Cross multiply
    154.99x = 232.57 × 143.38
  4. Step 4: Simplify right side
    154.99x = 33,345.89
  5. Step 5: Solve for x
    x = 33,345.89/154.99
  6. Step 6: Final answer
    x = 215.15

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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.