Home / 1,961.40-2,706.70-1,077.20

Finding the Fourth Proportional to 1,961.40, 2,706.70 and 1,077.20

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Solution

The fourth proportional to 1,961.40, 2,706.70 and 1,077.20 is: 1,486.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.40 : 2,706.70 = 1,077.20 : x
  2. Step 2: Convert to fraction form
    1,961.40/2,706.70 = 1,077.20/x
  3. Step 3: Cross multiply
    1,961.40x = 2,706.70 × 1,077.20
  4. Step 4: Simplify right side
    1,961.40x = 2,915,657.24
  5. Step 5: Solve for x
    x = 2,915,657.24/1,961.40
  6. Step 6: Final answer
    x = 1,486.52

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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.