Home / 1,288.20-1,939.29-1,154.25

Finding the Fourth Proportional to 1,288.20, 1,939.29 and 1,154.25

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Solution

The fourth proportional to 1,288.20, 1,939.29 and 1,154.25 is: 1,737.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.20 : 1,939.29 = 1,154.25 : x
  2. Step 2: Convert to fraction form
    1,288.20/1,939.29 = 1,154.25/x
  3. Step 3: Cross multiply
    1,288.20x = 1,939.29 × 1,154.25
  4. Step 4: Simplify right side
    1,288.20x = 2,238,427.65
  5. Step 5: Solve for x
    x = 2,238,427.65/1,288.20
  6. Step 6: Final answer
    x = 1,737.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.