Home / 1,317.20-1,972.28-1,151.15

Finding the Fourth Proportional to 1,317.20, 1,972.28 and 1,151.15

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Solution

The fourth proportional to 1,317.20, 1,972.28 and 1,151.15 is: 1,723.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.20 : 1,972.28 = 1,151.15 : x
  2. Step 2: Convert to fraction form
    1,317.20/1,972.28 = 1,151.15/x
  3. Step 3: Cross multiply
    1,317.20x = 1,972.28 × 1,151.15
  4. Step 4: Simplify right side
    1,317.20x = 2,270,383.14
  5. Step 5: Solve for x
    x = 2,270,383.14/1,317.20
  6. Step 6: Final answer
    x = 1,723.65

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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.