Home / 1,765.38-2,436.36-979.56

Finding the Fourth Proportional to 1,765.38, 2,436.36 and 979.56

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Solution

The fourth proportional to 1,765.38, 2,436.36 and 979.56 is: 1,351.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.38 : 2,436.36 = 979.56 : x
  2. Step 2: Convert to fraction form
    1,765.38/2,436.36 = 979.56/x
  3. Step 3: Cross multiply
    1,765.38x = 2,436.36 × 979.56
  4. Step 4: Simplify right side
    1,765.38x = 2,386,560.80
  5. Step 5: Solve for x
    x = 2,386,560.80/1,765.38
  6. Step 6: Final answer
    x = 1,351.87

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1.5x scale

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.