Home / 2,279.64-3,415.14-1,126.20

Finding the Fourth Proportional to 2,279.64, 3,415.14 and 1,126.20

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Solution

The fourth proportional to 2,279.64, 3,415.14 and 1,126.20 is: 1,687.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.64 : 3,415.14 = 1,126.20 : x
  2. Step 2: Convert to fraction form
    2,279.64/3,415.14 = 1,126.20/x
  3. Step 3: Cross multiply
    2,279.64x = 3,415.14 × 1,126.20
  4. Step 4: Simplify right side
    2,279.64x = 3,846,130.67
  5. Step 5: Solve for x
    x = 3,846,130.67/2,279.64
  6. Step 6: Final answer
    x = 1,687.17

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1.5x scale

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.