Home / 3,125.25-4,312.98-2,379.78

Finding the Fourth Proportional to 3,125.25, 4,312.98 and 2,379.78

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Solution

The fourth proportional to 3,125.25, 4,312.98 and 2,379.78 is: 3,284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.25 : 4,312.98 = 2,379.78 : x
  2. Step 2: Convert to fraction form
    3,125.25/4,312.98 = 2,379.78/x
  3. Step 3: Cross multiply
    3,125.25x = 4,312.98 × 2,379.78
  4. Step 4: Simplify right side
    3,125.25x = 10,263,943.54
  5. Step 5: Solve for x
    x = 10,263,943.54/3,125.25
  6. Step 6: Final answer
    x = 3,284.20

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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.