Home / 1,580.22-2,180.66-872.12

Finding the Fourth Proportional to 1,580.22, 2,180.66 and 872.12

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Solution

The fourth proportional to 1,580.22, 2,180.66 and 872.12 is: 1,203.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.22 : 2,180.66 = 872.12 : x
  2. Step 2: Convert to fraction form
    1,580.22/2,180.66 = 872.12/x
  3. Step 3: Cross multiply
    1,580.22x = 2,180.66 × 872.12
  4. Step 4: Simplify right side
    1,580.22x = 1,901,793.38
  5. Step 5: Solve for x
    x = 1,901,793.38/1,580.22
  6. Step 6: Final answer
    x = 1,203.50

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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.