Home / 1,331.76-1,988.84-1,260.74

Finding the Fourth Proportional to 1,331.76, 1,988.84 and 1,260.74

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Solution

The fourth proportional to 1,331.76, 1,988.84 and 1,260.74 is: 1,882.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.76 : 1,988.84 = 1,260.74 : x
  2. Step 2: Convert to fraction form
    1,331.76/1,988.84 = 1,260.74/x
  3. Step 3: Cross multiply
    1,331.76x = 1,988.84 × 1,260.74
  4. Step 4: Simplify right side
    1,331.76x = 2,507,410.14
  5. Step 5: Solve for x
    x = 2,507,410.14/1,331.76
  6. Step 6: Final answer
    x = 1,882.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.