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Finding the Fourth Proportional to 180.45, 248.90 and 147.65

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Solution

The fourth proportional to 180.45, 248.90 and 147.65 is: 203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.45 : 248.90 = 147.65 : x
  2. Step 2: Convert to fraction form
    180.45/248.90 = 147.65/x
  3. Step 3: Cross multiply
    180.45x = 248.90 × 147.65
  4. Step 4: Simplify right side
    180.45x = 36,748.10
  5. Step 5: Solve for x
    x = 36,748.10/180.45
  6. Step 6: Final answer
    x = 203.65

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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.