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Finding the Fourth Proportional to 702.09, 1,046.21 and 680.09

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Solution

The fourth proportional to 702.09, 1,046.21 and 680.09 is: 1,013.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.09 : 1,046.21 = 680.09 : x
  2. Step 2: Convert to fraction form
    702.09/1,046.21 = 680.09/x
  3. Step 3: Cross multiply
    702.09x = 1,046.21 × 680.09
  4. Step 4: Simplify right side
    702.09x = 711,508.33
  5. Step 5: Solve for x
    x = 711,508.33/702.09
  6. Step 6: Final answer
    x = 1,013.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.