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Finding the Fourth Proportional to 147.76, 219.80 and 146.20

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Solution

The fourth proportional to 147.76, 219.80 and 146.20 is: 217.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.76 : 219.80 = 146.20 : x
  2. Step 2: Convert to fraction form
    147.76/219.80 = 146.20/x
  3. Step 3: Cross multiply
    147.76x = 219.80 × 146.20
  4. Step 4: Simplify right side
    147.76x = 32,134.76
  5. Step 5: Solve for x
    x = 32,134.76/147.76
  6. Step 6: Final answer
    x = 217.48

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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.