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Finding the Fourth Proportional to 468.31, 702.32 and 143.57

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Solution

The fourth proportional to 468.31, 702.32 and 143.57 is: 215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.31 : 702.32 = 143.57 : x
  2. Step 2: Convert to fraction form
    468.31/702.32 = 143.57/x
  3. Step 3: Cross multiply
    468.31x = 702.32 × 143.57
  4. Step 4: Simplify right side
    468.31x = 100,828.57
  5. Step 5: Solve for x
    x = 100,828.57/468.31
  6. Step 6: Final answer
    x = 215.31

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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.