Home / 2,261.70-3,387.51-1,287.18

Finding the Fourth Proportional to 2,261.70, 3,387.51 and 1,287.18

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Solution

The fourth proportional to 2,261.70, 3,387.51 and 1,287.18 is: 1,927.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.70 : 3,387.51 = 1,287.18 : x
  2. Step 2: Convert to fraction form
    2,261.70/3,387.51 = 1,287.18/x
  3. Step 3: Cross multiply
    2,261.70x = 3,387.51 × 1,287.18
  4. Step 4: Simplify right side
    2,261.70x = 4,360,335.12
  5. Step 5: Solve for x
    x = 4,360,335.12/2,261.70
  6. Step 6: Final answer
    x = 1,927.90

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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.