Home / 2,489.04-3,432.78-1,690.56

Finding the Fourth Proportional to 2,489.04, 3,432.78 and 1,690.56

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Solution

The fourth proportional to 2,489.04, 3,432.78 and 1,690.56 is: 2,331.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.04 : 3,432.78 = 1,690.56 : x
  2. Step 2: Convert to fraction form
    2,489.04/3,432.78 = 1,690.56/x
  3. Step 3: Cross multiply
    2,489.04x = 3,432.78 × 1,690.56
  4. Step 4: Simplify right side
    2,489.04x = 5,803,320.56
  5. Step 5: Solve for x
    x = 5,803,320.56/2,489.04
  6. Step 6: Final answer
    x = 2,331.55

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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.