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Finding the Fourth Proportional to 702.13, 969.15 and 667.30

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Solution

The fourth proportional to 702.13, 969.15 and 667.30 is: 921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.13 : 969.15 = 667.30 : x
  2. Step 2: Convert to fraction form
    702.13/969.15 = 667.30/x
  3. Step 3: Cross multiply
    702.13x = 969.15 × 667.30
  4. Step 4: Simplify right side
    702.13x = 646,713.80
  5. Step 5: Solve for x
    x = 646,713.80/702.13
  6. Step 6: Final answer
    x = 921.07

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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.