Home / 1,521.78-2,100.39-932.70

Finding the Fourth Proportional to 1,521.78, 2,100.39 and 932.70

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Solution

The fourth proportional to 1,521.78, 2,100.39 and 932.70 is: 1,287.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.78 : 2,100.39 = 932.70 : x
  2. Step 2: Convert to fraction form
    1,521.78/2,100.39 = 932.70/x
  3. Step 3: Cross multiply
    1,521.78x = 2,100.39 × 932.70
  4. Step 4: Simplify right side
    1,521.78x = 1,959,033.75
  5. Step 5: Solve for x
    x = 1,959,033.75/1,521.78
  6. Step 6: Final answer
    x = 1,287.33

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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.