Home / 1,358.85-1,861.16-1,279.06

Finding the Fourth Proportional to 1,358.85, 1,861.16 and 1,279.06

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Solution

The fourth proportional to 1,358.85, 1,861.16 and 1,279.06 is: 1,751.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.85 : 1,861.16 = 1,279.06 : x
  2. Step 2: Convert to fraction form
    1,358.85/1,861.16 = 1,279.06/x
  3. Step 3: Cross multiply
    1,358.85x = 1,861.16 × 1,279.06
  4. Step 4: Simplify right side
    1,358.85x = 2,380,526.80
  5. Step 5: Solve for x
    x = 2,380,526.80/1,358.85
  6. Step 6: Final answer
    x = 1,751.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.