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Finding the Fourth Proportional to 642.39, 963.54 and 180.15

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Solution

The fourth proportional to 642.39, 963.54 and 180.15 is: 270.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.39 : 963.54 = 180.15 : x
  2. Step 2: Convert to fraction form
    642.39/963.54 = 180.15/x
  3. Step 3: Cross multiply
    642.39x = 963.54 × 180.15
  4. Step 4: Simplify right side
    642.39x = 173,581.73
  5. Step 5: Solve for x
    x = 173,581.73/642.39
  6. Step 6: Final answer
    x = 270.21

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1.5x scale

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.