Home / 1,769.12-2,439.09-1,138.52

Finding the Fourth Proportional to 1,769.12, 2,439.09 and 1,138.52

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Solution

The fourth proportional to 1,769.12, 2,439.09 and 1,138.52 is: 1,569.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.12 : 2,439.09 = 1,138.52 : x
  2. Step 2: Convert to fraction form
    1,769.12/2,439.09 = 1,138.52/x
  3. Step 3: Cross multiply
    1,769.12x = 2,439.09 × 1,138.52
  4. Step 4: Simplify right side
    1,769.12x = 2,776,952.75
  5. Step 5: Solve for x
    x = 2,776,952.75/1,769.12
  6. Step 6: Final answer
    x = 1,569.68

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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.