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Finding the Fourth Proportional to 147.28, 219.80 and 143.44

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Solution

The fourth proportional to 147.28, 219.80 and 143.44 is: 214.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.28 : 219.80 = 143.44 : x
  2. Step 2: Convert to fraction form
    147.28/219.80 = 143.44/x
  3. Step 3: Cross multiply
    147.28x = 219.80 × 143.44
  4. Step 4: Simplify right side
    147.28x = 31,528.11
  5. Step 5: Solve for x
    x = 31,528.11/147.28
  6. Step 6: Final answer
    x = 214.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.