Home / 1,313.87-1,961.78-1,158.57

Finding the Fourth Proportional to 1,313.87, 1,961.78 and 1,158.57

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Solution

The fourth proportional to 1,313.87, 1,961.78 and 1,158.57 is: 1,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.87 : 1,961.78 = 1,158.57 : x
  2. Step 2: Convert to fraction form
    1,313.87/1,961.78 = 1,158.57/x
  3. Step 3: Cross multiply
    1,313.87x = 1,961.78 × 1,158.57
  4. Step 4: Simplify right side
    1,313.87x = 2,272,853.66
  5. Step 5: Solve for x
    x = 2,272,853.66/1,313.87
  6. Step 6: Final answer
    x = 1,729.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.