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Finding the Fourth Proportional to 424.25, 636.45 and 146.62

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Solution

The fourth proportional to 424.25, 636.45 and 146.62 is: 219.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.25 : 636.45 = 146.62 : x
  2. Step 2: Convert to fraction form
    424.25/636.45 = 146.62/x
  3. Step 3: Cross multiply
    424.25x = 636.45 × 146.62
  4. Step 4: Simplify right side
    424.25x = 93,313.12
  5. Step 5: Solve for x
    x = 93,313.12/424.25
  6. Step 6: Final answer
    x = 219.95

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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.