Home / 2,777.28-4,163.76-1,315.68

Finding the Fourth Proportional to 2,777.28, 4,163.76 and 1,315.68

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Solution

The fourth proportional to 2,777.28, 4,163.76 and 1,315.68 is: 1,972.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.28 : 4,163.76 = 1,315.68 : x
  2. Step 2: Convert to fraction form
    2,777.28/4,163.76 = 1,315.68/x
  3. Step 3: Cross multiply
    2,777.28x = 4,163.76 × 1,315.68
  4. Step 4: Simplify right side
    2,777.28x = 5,478,175.76
  5. Step 5: Solve for x
    x = 5,478,175.76/2,777.28
  6. Step 6: Final answer
    x = 1,972.50

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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.