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Finding the Fourth Proportional to 147.39, 219.65 and 147.16

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Solution

The fourth proportional to 147.39, 219.65 and 147.16 is: 219.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.39 : 219.65 = 147.16 : x
  2. Step 2: Convert to fraction form
    147.39/219.65 = 147.16/x
  3. Step 3: Cross multiply
    147.39x = 219.65 × 147.16
  4. Step 4: Simplify right side
    147.39x = 32,323.69
  5. Step 5: Solve for x
    x = 32,323.69/147.39
  6. Step 6: Final answer
    x = 219.31

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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.