Home / 1,180.22-1,772.80-1,139.28

Finding the Fourth Proportional to 1,180.22, 1,772.80 and 1,139.28

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Solution

The fourth proportional to 1,180.22, 1,772.80 and 1,139.28 is: 1,711.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.22 : 1,772.80 = 1,139.28 : x
  2. Step 2: Convert to fraction form
    1,180.22/1,772.80 = 1,139.28/x
  3. Step 3: Cross multiply
    1,180.22x = 1,772.80 × 1,139.28
  4. Step 4: Simplify right side
    1,180.22x = 2,019,715.58
  5. Step 5: Solve for x
    x = 2,019,715.58/1,180.22
  6. Step 6: Final answer
    x = 1,711.30

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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.