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Finding the Fourth Proportional to 468.38, 702.62 and 143.76

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Solution

The fourth proportional to 468.38, 702.62 and 143.76 is: 215.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.38 : 702.62 = 143.76 : x
  2. Step 2: Convert to fraction form
    468.38/702.62 = 143.76/x
  3. Step 3: Cross multiply
    468.38x = 702.62 × 143.76
  4. Step 4: Simplify right side
    468.38x = 101,008.65
  5. Step 5: Solve for x
    x = 101,008.65/468.38
  6. Step 6: Final answer
    x = 215.66

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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.