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Finding the Fourth Proportional to 147.24, 221.40 and 145.44

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Solution

The fourth proportional to 147.24, 221.40 and 145.44 is: 218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.24 : 221.40 = 145.44 : x
  2. Step 2: Convert to fraction form
    147.24/221.40 = 145.44/x
  3. Step 3: Cross multiply
    147.24x = 221.40 × 145.44
  4. Step 4: Simplify right side
    147.24x = 32,200.42
  5. Step 5: Solve for x
    x = 32,200.42/147.24
  6. Step 6: Final answer
    x = 218.69

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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.