Home / 2,320.11-3,478.55-858.87

Finding the Fourth Proportional to 2,320.11, 3,478.55 and 858.87

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Solution

The fourth proportional to 2,320.11, 3,478.55 and 858.87 is: 1,287.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.11 : 3,478.55 = 858.87 : x
  2. Step 2: Convert to fraction form
    2,320.11/3,478.55 = 858.87/x
  3. Step 3: Cross multiply
    2,320.11x = 3,478.55 × 858.87
  4. Step 4: Simplify right side
    2,320.11x = 2,987,617.94
  5. Step 5: Solve for x
    x = 2,987,617.94/2,320.11
  6. Step 6: Final answer
    x = 1,287.71

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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.