Home / 1,947.26-2,920.94-486.42

Finding the Fourth Proportional to 1,947.26, 2,920.94 and 486.42

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Solution

The fourth proportional to 1,947.26, 2,920.94 and 486.42 is: 729.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.26 : 2,920.94 = 486.42 : x
  2. Step 2: Convert to fraction form
    1,947.26/2,920.94 = 486.42/x
  3. Step 3: Cross multiply
    1,947.26x = 2,920.94 × 486.42
  4. Step 4: Simplify right side
    1,947.26x = 1,420,803.63
  5. Step 5: Solve for x
    x = 1,420,803.63/1,947.26
  6. Step 6: Final answer
    x = 729.64

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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.