Home / 2,917.20-4,375.80-1,981.65

Finding the Fourth Proportional to 2,917.20, 4,375.80 and 1,981.65

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Solution

The fourth proportional to 2,917.20, 4,375.80 and 1,981.65 is: 2,972.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,917.20 : 4,375.80 = 1,981.65 : x
  2. Step 2: Convert to fraction form
    2,917.20/4,375.80 = 1,981.65/x
  3. Step 3: Cross multiply
    2,917.20x = 4,375.80 × 1,981.65
  4. Step 4: Simplify right side
    2,917.20x = 8,671,304.07
  5. Step 5: Solve for x
    x = 8,671,304.07/2,917.20
  6. Step 6: Final answer
    x = 2,972.48

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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.