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Finding the Fourth Proportional to 465.46, 698.26 and 140.78

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Solution

The fourth proportional to 465.46, 698.26 and 140.78 is: 211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.46 : 698.26 = 140.78 : x
  2. Step 2: Convert to fraction form
    465.46/698.26 = 140.78/x
  3. Step 3: Cross multiply
    465.46x = 698.26 × 140.78
  4. Step 4: Simplify right side
    465.46x = 98,301.04
  5. Step 5: Solve for x
    x = 98,301.04/465.46
  6. Step 6: Final answer
    x = 211.19

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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.