Home / 2,310.80-3,186.84-1,917.20

Finding the Fourth Proportional to 2,310.80, 3,186.84 and 1,917.20

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Solution

The fourth proportional to 2,310.80, 3,186.84 and 1,917.20 is: 2,644.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,310.80 : 3,186.84 = 1,917.20 : x
  2. Step 2: Convert to fraction form
    2,310.80/3,186.84 = 1,917.20/x
  3. Step 3: Cross multiply
    2,310.80x = 3,186.84 × 1,917.20
  4. Step 4: Simplify right side
    2,310.80x = 6,109,809.65
  5. Step 5: Solve for x
    x = 6,109,809.65/2,310.80
  6. Step 6: Final answer
    x = 2,644.02

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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.