Home / 1,320.40-1,974.77-1,175.18

Finding the Fourth Proportional to 1,320.40, 1,974.77 and 1,175.18

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Solution

The fourth proportional to 1,320.40, 1,974.77 and 1,175.18 is: 1,757.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.40 : 1,974.77 = 1,175.18 : x
  2. Step 2: Convert to fraction form
    1,320.40/1,974.77 = 1,175.18/x
  3. Step 3: Cross multiply
    1,320.40x = 1,974.77 × 1,175.18
  4. Step 4: Simplify right side
    1,320.40x = 2,320,694.46
  5. Step 5: Solve for x
    x = 2,320,694.46/1,320.40
  6. Step 6: Final answer
    x = 1,757.57

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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.