Home / 3,947.60-5,922.08-1,315.28

Finding the Fourth Proportional to 3,947.60, 5,922.08 and 1,315.28

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Solution

The fourth proportional to 3,947.60, 5,922.08 and 1,315.28 is: 1,973.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.60 : 5,922.08 = 1,315.28 : x
  2. Step 2: Convert to fraction form
    3,947.60/5,922.08 = 1,315.28/x
  3. Step 3: Cross multiply
    3,947.60x = 5,922.08 × 1,315.28
  4. Step 4: Simplify right side
    3,947.60x = 7,789,193.38
  5. Step 5: Solve for x
    x = 7,789,193.38/3,947.60
  6. Step 6: Final answer
    x = 1,973.15

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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.