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Finding the Fourth Proportional to 1,226.97, 1,693.19 and 702.98

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Solution

The fourth proportional to 1,226.97, 1,693.19 and 702.98 is: 970.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.97 : 1,693.19 = 702.98 : x
  2. Step 2: Convert to fraction form
    1,226.97/1,693.19 = 702.98/x
  3. Step 3: Cross multiply
    1,226.97x = 1,693.19 × 702.98
  4. Step 4: Simplify right side
    1,226.97x = 1,190,266.73
  5. Step 5: Solve for x
    x = 1,190,266.73/1,226.97
  6. Step 6: Final answer
    x = 970.09

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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.