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Finding the Fourth Proportional to 468.45, 702.69 and 143.85

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Solution

The fourth proportional to 468.45, 702.69 and 143.85 is: 215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.45 : 702.69 = 143.85 : x
  2. Step 2: Convert to fraction form
    468.45/702.69 = 143.85/x
  3. Step 3: Cross multiply
    468.45x = 702.69 × 143.85
  4. Step 4: Simplify right side
    468.45x = 101,081.96
  5. Step 5: Solve for x
    x = 101,081.96/468.45
  6. Step 6: Final answer
    x = 215.78

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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.