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Finding the Fourth Proportional to 180.74, 248.87 and 154.46

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Solution

The fourth proportional to 180.74, 248.87 and 154.46 is: 212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.74 : 248.87 = 154.46 : x
  2. Step 2: Convert to fraction form
    180.74/248.87 = 154.46/x
  3. Step 3: Cross multiply
    180.74x = 248.87 × 154.46
  4. Step 4: Simplify right side
    180.74x = 38,441.47
  5. Step 5: Solve for x
    x = 38,441.47/180.74
  6. Step 6: Final answer
    x = 212.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.