Home / 1,261.89-1,741.40-702.40

Finding the Fourth Proportional to 1,261.89, 1,741.40 and 702.40

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Solution

The fourth proportional to 1,261.89, 1,741.40 and 702.40 is: 969.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.89 : 1,741.40 = 702.40 : x
  2. Step 2: Convert to fraction form
    1,261.89/1,741.40 = 702.40/x
  3. Step 3: Cross multiply
    1,261.89x = 1,741.40 × 702.40
  4. Step 4: Simplify right side
    1,261.89x = 1,223,155.85
  5. Step 5: Solve for x
    x = 1,223,155.85/1,261.89
  6. Step 6: Final answer
    x = 969.31

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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.