Home / 2,689.92-4,032.84-1,390.56

Finding the Fourth Proportional to 2,689.92, 4,032.84 and 1,390.56

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Solution

The fourth proportional to 2,689.92, 4,032.84 and 1,390.56 is: 2,084.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.92 : 4,032.84 = 1,390.56 : x
  2. Step 2: Convert to fraction form
    2,689.92/4,032.84 = 1,390.56/x
  3. Step 3: Cross multiply
    2,689.92x = 4,032.84 × 1,390.56
  4. Step 4: Simplify right side
    2,689.92x = 5,607,905.99
  5. Step 5: Solve for x
    x = 5,607,905.99/2,689.92
  6. Step 6: Final answer
    x = 2,084.79

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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.