Home / 1,427.20-2,142.15-880.45

Finding the Fourth Proportional to 1,427.20, 2,142.15 and 880.45

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Solution

The fourth proportional to 1,427.20, 2,142.15 and 880.45 is: 1,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.20 : 2,142.15 = 880.45 : x
  2. Step 2: Convert to fraction form
    1,427.20/2,142.15 = 880.45/x
  3. Step 3: Cross multiply
    1,427.20x = 2,142.15 × 880.45
  4. Step 4: Simplify right side
    1,427.20x = 1,886,055.97
  5. Step 5: Solve for x
    x = 1,886,055.97/1,427.20
  6. Step 6: Final answer
    x = 1,321.51

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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.