Home / 2,490.22-3,728.28-1,317.56

Finding the Fourth Proportional to 2,490.22, 3,728.28 and 1,317.56

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Solution

The fourth proportional to 2,490.22, 3,728.28 and 1,317.56 is: 1,972.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.22 : 3,728.28 = 1,317.56 : x
  2. Step 2: Convert to fraction form
    2,490.22/3,728.28 = 1,317.56/x
  3. Step 3: Cross multiply
    2,490.22x = 3,728.28 × 1,317.56
  4. Step 4: Simplify right side
    2,490.22x = 4,912,232.60
  5. Step 5: Solve for x
    x = 4,912,232.60/2,490.22
  6. Step 6: Final answer
    x = 1,972.61

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1.5x scale

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.