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Finding the Fourth Proportional to 2,689.91, 4,034.86 and 1,047.61

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Solution

The fourth proportional to 2,689.91, 4,034.86 and 1,047.61 is: 1,571.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.91 : 4,034.86 = 1,047.61 : x
  2. Step 2: Convert to fraction form
    2,689.91/4,034.86 = 1,047.61/x
  3. Step 3: Cross multiply
    2,689.91x = 4,034.86 × 1,047.61
  4. Step 4: Simplify right side
    2,689.91x = 4,226,959.68
  5. Step 5: Solve for x
    x = 4,226,959.68/2,689.91
  6. Step 6: Final answer
    x = 1,571.41

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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.