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Finding the Fourth Proportional to 465.78, 698.76 and 141.17

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Solution

The fourth proportional to 465.78, 698.76 and 141.17 is: 211.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.78 : 698.76 = 141.17 : x
  2. Step 2: Convert to fraction form
    465.78/698.76 = 141.17/x
  3. Step 3: Cross multiply
    465.78x = 698.76 × 141.17
  4. Step 4: Simplify right side
    465.78x = 98,643.02
  5. Step 5: Solve for x
    x = 98,643.02/465.78
  6. Step 6: Final answer
    x = 211.78

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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.