Home / 3,948.28-5,921.64-1,315.36

Finding the Fourth Proportional to 3,948.28, 5,921.64 and 1,315.36

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Solution

The fourth proportional to 3,948.28, 5,921.64 and 1,315.36 is: 1,972.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.28 : 5,921.64 = 1,315.36 : x
  2. Step 2: Convert to fraction form
    3,948.28/5,921.64 = 1,315.36/x
  3. Step 3: Cross multiply
    3,948.28x = 5,921.64 × 1,315.36
  4. Step 4: Simplify right side
    3,948.28x = 7,789,088.39
  5. Step 5: Solve for x
    x = 7,789,088.39/3,948.28
  6. Step 6: Final answer
    x = 1,972.78

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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.