Home / 2,285.11-3,153.38-1,290.18

Finding the Fourth Proportional to 2,285.11, 3,153.38 and 1,290.18

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Solution

The fourth proportional to 2,285.11, 3,153.38 and 1,290.18 is: 1,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.11 : 3,153.38 = 1,290.18 : x
  2. Step 2: Convert to fraction form
    2,285.11/3,153.38 = 1,290.18/x
  3. Step 3: Cross multiply
    2,285.11x = 3,153.38 × 1,290.18
  4. Step 4: Simplify right side
    2,285.11x = 4,068,422.70
  5. Step 5: Solve for x
    x = 4,068,422.70/2,285.11
  6. Step 6: Final answer
    x = 1,780.40

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Double scale
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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.