Home / 1,261.70-1,741.18-702.12

Finding the Fourth Proportional to 1,261.70, 1,741.18 and 702.12

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Solution

The fourth proportional to 1,261.70, 1,741.18 and 702.12 is: 968.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.70 : 1,741.18 = 702.12 : x
  2. Step 2: Convert to fraction form
    1,261.70/1,741.18 = 702.12/x
  3. Step 3: Cross multiply
    1,261.70x = 1,741.18 × 702.12
  4. Step 4: Simplify right side
    1,261.70x = 1,222,517.30
  5. Step 5: Solve for x
    x = 1,222,517.30/1,261.70
  6. Step 6: Final answer
    x = 968.94

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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.