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Finding the Fourth Proportional to 247.53, 371.30 and 145.53

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Solution

The fourth proportional to 247.53, 371.30 and 145.53 is: 218.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.53 : 371.30 = 145.53 : x
  2. Step 2: Convert to fraction form
    247.53/371.30 = 145.53/x
  3. Step 3: Cross multiply
    247.53x = 371.30 × 145.53
  4. Step 4: Simplify right side
    247.53x = 54,032.70
  5. Step 5: Solve for x
    x = 54,032.70/247.53
  6. Step 6: Final answer
    x = 218.29

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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.