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Finding the Fourth Proportional to 702.09, 968.87 and 387.39

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Solution

The fourth proportional to 702.09, 968.87 and 387.39 is: 534.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.09 : 968.87 = 387.39 : x
  2. Step 2: Convert to fraction form
    702.09/968.87 = 387.39/x
  3. Step 3: Cross multiply
    702.09x = 968.87 × 387.39
  4. Step 4: Simplify right side
    702.09x = 375,326.67
  5. Step 5: Solve for x
    x = 375,326.67/702.09
  6. Step 6: Final answer
    x = 534.58

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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.