Home / 3,815.20-5,721.34-1,315.66

Finding the Fourth Proportional to 3,815.20, 5,721.34 and 1,315.66

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Solution

The fourth proportional to 3,815.20, 5,721.34 and 1,315.66 is: 1,972.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.20 : 5,721.34 = 1,315.66 : x
  2. Step 2: Convert to fraction form
    3,815.20/5,721.34 = 1,315.66/x
  3. Step 3: Cross multiply
    3,815.20x = 5,721.34 × 1,315.66
  4. Step 4: Simplify right side
    3,815.20x = 7,527,338.18
  5. Step 5: Solve for x
    x = 7,527,338.18/3,815.20
  6. Step 6: Final answer
    x = 1,972.99

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1.5x scale

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.