Home / 1,947.24-2,919.67-777.42

Finding the Fourth Proportional to 1,947.24, 2,919.67 and 777.42

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Solution

The fourth proportional to 1,947.24, 2,919.67 and 777.42 is: 1,165.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.24 : 2,919.67 = 777.42 : x
  2. Step 2: Convert to fraction form
    1,947.24/2,919.67 = 777.42/x
  3. Step 3: Cross multiply
    1,947.24x = 2,919.67 × 777.42
  4. Step 4: Simplify right side
    1,947.24x = 2,269,809.85
  5. Step 5: Solve for x
    x = 2,269,809.85/1,947.24
  6. Step 6: Final answer
    x = 1,165.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.