Home / 1,689.08-2,331.12-1,025.75

Finding the Fourth Proportional to 1,689.08, 2,331.12 and 1,025.75

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Solution

The fourth proportional to 1,689.08, 2,331.12 and 1,025.75 is: 1,415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.08 : 2,331.12 = 1,025.75 : x
  2. Step 2: Convert to fraction form
    1,689.08/2,331.12 = 1,025.75/x
  3. Step 3: Cross multiply
    1,689.08x = 2,331.12 × 1,025.75
  4. Step 4: Simplify right side
    1,689.08x = 2,391,134.68
  5. Step 5: Solve for x
    x = 2,391,134.68/1,689.08
  6. Step 6: Final answer
    x = 1,415.65

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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.