Home / 2,279.90-3,146.21-1,285.16

Finding the Fourth Proportional to 2,279.90, 3,146.21 and 1,285.16

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Solution

The fourth proportional to 2,279.90, 3,146.21 and 1,285.16 is: 1,773.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.90 : 3,146.21 = 1,285.16 : x
  2. Step 2: Convert to fraction form
    2,279.90/3,146.21 = 1,285.16/x
  3. Step 3: Cross multiply
    2,279.90x = 3,146.21 × 1,285.16
  4. Step 4: Simplify right side
    2,279.90x = 4,043,370.73
  5. Step 5: Solve for x
    x = 4,043,370.73/2,279.90
  6. Step 6: Final answer
    x = 1,773.49

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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.