Home / 3,246.78-4,480.88-1,988.65

Finding the Fourth Proportional to 3,246.78, 4,480.88 and 1,988.65

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Solution

The fourth proportional to 3,246.78, 4,480.88 and 1,988.65 is: 2,744.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.78 : 4,480.88 = 1,988.65 : x
  2. Step 2: Convert to fraction form
    3,246.78/4,480.88 = 1,988.65/x
  3. Step 3: Cross multiply
    3,246.78x = 4,480.88 × 1,988.65
  4. Step 4: Simplify right side
    3,246.78x = 8,910,892.07
  5. Step 5: Solve for x
    x = 8,910,892.07/3,246.78
  6. Step 6: Final answer
    x = 2,744.54

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1.5x scale

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.