Home / 2,981.75-4,115.22-1,803.20

Finding the Fourth Proportional to 2,981.75, 4,115.22 and 1,803.20

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Solution

The fourth proportional to 2,981.75, 4,115.22 and 1,803.20 is: 2,488.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.75 : 4,115.22 = 1,803.20 : x
  2. Step 2: Convert to fraction form
    2,981.75/4,115.22 = 1,803.20/x
  3. Step 3: Cross multiply
    2,981.75x = 4,115.22 × 1,803.20
  4. Step 4: Simplify right side
    2,981.75x = 7,420,564.70
  5. Step 5: Solve for x
    x = 7,420,564.70/2,981.75
  6. Step 6: Final answer
    x = 2,488.66

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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.