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Finding the Fourth Proportional to 144.30, 216.39 and 52.97

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Solution

The fourth proportional to 144.30, 216.39 and 52.97 is: 79.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.30 : 216.39 = 52.97 : x
  2. Step 2: Convert to fraction form
    144.30/216.39 = 52.97/x
  3. Step 3: Cross multiply
    144.30x = 216.39 × 52.97
  4. Step 4: Simplify right side
    144.30x = 11,462.18
  5. Step 5: Solve for x
    x = 11,462.18/144.30
  6. Step 6: Final answer
    x = 79.43

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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.