Home / 1,264.40-1,886.44-1,125.80

Finding the Fourth Proportional to 1,264.40, 1,886.44 and 1,125.80

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Solution

The fourth proportional to 1,264.40, 1,886.44 and 1,125.80 is: 1,679.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.40 : 1,886.44 = 1,125.80 : x
  2. Step 2: Convert to fraction form
    1,264.40/1,886.44 = 1,125.80/x
  3. Step 3: Cross multiply
    1,264.40x = 1,886.44 × 1,125.80
  4. Step 4: Simplify right side
    1,264.40x = 2,123,754.15
  5. Step 5: Solve for x
    x = 2,123,754.15/1,264.40
  6. Step 6: Final answer
    x = 1,679.65

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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.