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Finding the Fourth Proportional to 702.13, 968.90 and 387.44

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Solution

The fourth proportional to 702.13, 968.90 and 387.44 is: 534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.13 : 968.90 = 387.44 : x
  2. Step 2: Convert to fraction form
    702.13/968.90 = 387.44/x
  3. Step 3: Cross multiply
    702.13x = 968.90 × 387.44
  4. Step 4: Simplify right side
    702.13x = 375,390.62
  5. Step 5: Solve for x
    x = 375,390.62/702.13
  6. Step 6: Final answer
    x = 534.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.