Home / 1,689.20-2,534.57-1,072.74

Finding the Fourth Proportional to 1,689.20, 2,534.57 and 1,072.74

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Solution

The fourth proportional to 1,689.20, 2,534.57 and 1,072.74 is: 1,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.20 : 2,534.57 = 1,072.74 : x
  2. Step 2: Convert to fraction form
    1,689.20/2,534.57 = 1,072.74/x
  3. Step 3: Cross multiply
    1,689.20x = 2,534.57 × 1,072.74
  4. Step 4: Simplify right side
    1,689.20x = 2,718,939.77
  5. Step 5: Solve for x
    x = 2,718,939.77/1,689.20
  6. Step 6: Final answer
    x = 1,609.60

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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.