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Finding the Fourth Proportional to 219.41, 328.77 and 147.11

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Solution

The fourth proportional to 219.41, 328.77 and 147.11 is: 220.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.41 : 328.77 = 147.11 : x
  2. Step 2: Convert to fraction form
    219.41/328.77 = 147.11/x
  3. Step 3: Cross multiply
    219.41x = 328.77 × 147.11
  4. Step 4: Simplify right side
    219.41x = 48,365.35
  5. Step 5: Solve for x
    x = 48,365.35/219.41
  6. Step 6: Final answer
    x = 220.43

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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.