Home / 2,447.98-3,378.12-1,385.78

Finding the Fourth Proportional to 2,447.98, 3,378.12 and 1,385.78

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Solution

The fourth proportional to 2,447.98, 3,378.12 and 1,385.78 is: 1,912.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,447.98 : 3,378.12 = 1,385.78 : x
  2. Step 2: Convert to fraction form
    2,447.98/3,378.12 = 1,385.78/x
  3. Step 3: Cross multiply
    2,447.98x = 3,378.12 × 1,385.78
  4. Step 4: Simplify right side
    2,447.98x = 4,681,331.13
  5. Step 5: Solve for x
    x = 4,681,331.13/2,447.98
  6. Step 6: Final answer
    x = 1,912.32

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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.