Home / 2,287.12-3,156.19-1,292.42

Finding the Fourth Proportional to 2,287.12, 3,156.19 and 1,292.42

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Solution

The fourth proportional to 2,287.12, 3,156.19 and 1,292.42 is: 1,783.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.12 : 3,156.19 = 1,292.42 : x
  2. Step 2: Convert to fraction form
    2,287.12/3,156.19 = 1,292.42/x
  3. Step 3: Cross multiply
    2,287.12x = 3,156.19 × 1,292.42
  4. Step 4: Simplify right side
    2,287.12x = 4,079,118.06
  5. Step 5: Solve for x
    x = 4,079,118.06/2,287.12
  6. Step 6: Final answer
    x = 1,783.51

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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.