Home / 2,279.28-3,145.36-1,395.12

Finding the Fourth Proportional to 2,279.28, 3,145.36 and 1,395.12

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Solution

The fourth proportional to 2,279.28, 3,145.36 and 1,395.12 is: 1,925.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.28 : 3,145.36 = 1,395.12 : x
  2. Step 2: Convert to fraction form
    2,279.28/3,145.36 = 1,395.12/x
  3. Step 3: Cross multiply
    2,279.28x = 3,145.36 × 1,395.12
  4. Step 4: Simplify right side
    2,279.28x = 4,388,154.64
  5. Step 5: Solve for x
    x = 4,388,154.64/2,279.28
  6. Step 6: Final answer
    x = 1,925.24

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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.