Home / 2,490.78-3,731.85-1,839.90

Finding the Fourth Proportional to 2,490.78, 3,731.85 and 1,839.90

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Solution

The fourth proportional to 2,490.78, 3,731.85 and 1,839.90 is: 2,756.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.78 : 3,731.85 = 1,839.90 : x
  2. Step 2: Convert to fraction form
    2,490.78/3,731.85 = 1,839.90/x
  3. Step 3: Cross multiply
    2,490.78x = 3,731.85 × 1,839.90
  4. Step 4: Simplify right side
    2,490.78x = 6,866,230.82
  5. Step 5: Solve for x
    x = 6,866,230.82/2,490.78
  6. Step 6: Final answer
    x = 2,756.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.