Home / 1,442.36-2,161.38-864.60

Finding the Fourth Proportional to 1,442.36, 2,161.38 and 864.60

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Solution

The fourth proportional to 1,442.36, 2,161.38 and 864.60 is: 1,295.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.36 : 2,161.38 = 864.60 : x
  2. Step 2: Convert to fraction form
    1,442.36/2,161.38 = 864.60/x
  3. Step 3: Cross multiply
    1,442.36x = 2,161.38 × 864.60
  4. Step 4: Simplify right side
    1,442.36x = 1,868,729.15
  5. Step 5: Solve for x
    x = 1,868,729.15/1,442.36
  6. Step 6: Final answer
    x = 1,295.61

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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.