Home / 1,253.26-1,870.70-1,115.97

Finding the Fourth Proportional to 1,253.26, 1,870.70 and 1,115.97

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Solution

The fourth proportional to 1,253.26, 1,870.70 and 1,115.97 is: 1,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.26 : 1,870.70 = 1,115.97 : x
  2. Step 2: Convert to fraction form
    1,253.26/1,870.70 = 1,115.97/x
  3. Step 3: Cross multiply
    1,253.26x = 1,870.70 × 1,115.97
  4. Step 4: Simplify right side
    1,253.26x = 2,087,645.08
  5. Step 5: Solve for x
    x = 2,087,645.08/1,253.26
  6. Step 6: Final answer
    x = 1,665.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.