Home / 3,125.28-4,312.72-1,728

Finding the Fourth Proportional to 3,125.28, 4,312.72 and 1,728

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Solution

The fourth proportional to 3,125.28, 4,312.72 and 1,728 is: 2,384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.28 : 4,312.72 = 1,728 : x
  2. Step 2: Convert to fraction form
    3,125.28/4,312.72 = 1,728/x
  3. Step 3: Cross multiply
    3,125.28x = 4,312.72 × 1,728
  4. Step 4: Simplify right side
    3,125.28x = 7,452,380.16
  5. Step 5: Solve for x
    x = 7,452,380.16/3,125.28
  6. Step 6: Final answer
    x = 2,384.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.