Home / 1,721.28-2,577.60-1,309.80

Finding the Fourth Proportional to 1,721.28, 2,577.60 and 1,309.80

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Solution

The fourth proportional to 1,721.28, 2,577.60 and 1,309.80 is: 1,961.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.28 : 2,577.60 = 1,309.80 : x
  2. Step 2: Convert to fraction form
    1,721.28/2,577.60 = 1,309.80/x
  3. Step 3: Cross multiply
    1,721.28x = 2,577.60 × 1,309.80
  4. Step 4: Simplify right side
    1,721.28x = 3,376,140.48
  5. Step 5: Solve for x
    x = 3,376,140.48/1,721.28
  6. Step 6: Final answer
    x = 1,961.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.