Home / 3,128.78-4,315.98-2,008.46

Finding the Fourth Proportional to 3,128.78, 4,315.98 and 2,008.46

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Solution

The fourth proportional to 3,128.78, 4,315.98 and 2,008.46 is: 2,770.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.78 : 4,315.98 = 2,008.46 : x
  2. Step 2: Convert to fraction form
    3,128.78/4,315.98 = 2,008.46/x
  3. Step 3: Cross multiply
    3,128.78x = 4,315.98 × 2,008.46
  4. Step 4: Simplify right side
    3,128.78x = 8,668,473.19
  5. Step 5: Solve for x
    x = 8,668,473.19/3,128.78
  6. Step 6: Final answer
    x = 2,770.56

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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.