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Finding the Fourth Proportional to 434.80, 652.05 and 146.17

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Solution

The fourth proportional to 434.80, 652.05 and 146.17 is: 219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.80 : 652.05 = 146.17 : x
  2. Step 2: Convert to fraction form
    434.80/652.05 = 146.17/x
  3. Step 3: Cross multiply
    434.80x = 652.05 × 146.17
  4. Step 4: Simplify right side
    434.80x = 95,310.15
  5. Step 5: Solve for x
    x = 95,310.15/434.80
  6. Step 6: Final answer
    x = 219.20

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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.