Home / 1,501.20-2,072.16-871.92

Finding the Fourth Proportional to 1,501.20, 2,072.16 and 871.92

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Solution

The fourth proportional to 1,501.20, 2,072.16 and 871.92 is: 1,203.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.20 : 2,072.16 = 871.92 : x
  2. Step 2: Convert to fraction form
    1,501.20/2,072.16 = 871.92/x
  3. Step 3: Cross multiply
    1,501.20x = 2,072.16 × 871.92
  4. Step 4: Simplify right side
    1,501.20x = 1,806,757.75
  5. Step 5: Solve for x
    x = 1,806,757.75/1,501.20
  6. Step 6: Final answer
    x = 1,203.54

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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.