Home / 1,177.80-1,765.04-1,115.43

Finding the Fourth Proportional to 1,177.80, 1,765.04 and 1,115.43

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Solution

The fourth proportional to 1,177.80, 1,765.04 and 1,115.43 is: 1,671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.80 : 1,765.04 = 1,115.43 : x
  2. Step 2: Convert to fraction form
    1,177.80/1,765.04 = 1,115.43/x
  3. Step 3: Cross multiply
    1,177.80x = 1,765.04 × 1,115.43
  4. Step 4: Simplify right side
    1,177.80x = 1,968,772.99
  5. Step 5: Solve for x
    x = 1,968,772.99/1,177.80
  6. Step 6: Final answer
    x = 1,671.57

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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.