Home / 2,279.13-3,143.57-1,395.42

Finding the Fourth Proportional to 2,279.13, 3,143.57 and 1,395.42

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Solution

The fourth proportional to 2,279.13, 3,143.57 and 1,395.42 is: 1,924.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.13 : 3,143.57 = 1,395.42 : x
  2. Step 2: Convert to fraction form
    2,279.13/3,143.57 = 1,395.42/x
  3. Step 3: Cross multiply
    2,279.13x = 3,143.57 × 1,395.42
  4. Step 4: Simplify right side
    2,279.13x = 4,386,593.47
  5. Step 5: Solve for x
    x = 4,386,593.47/2,279.13
  6. Step 6: Final answer
    x = 1,924.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.