Home / 3,913.76-5,400.72-2,299.20

Finding the Fourth Proportional to 3,913.76, 5,400.72 and 2,299.20

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Solution

The fourth proportional to 3,913.76, 5,400.72 and 2,299.20 is: 3,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.76 : 5,400.72 = 2,299.20 : x
  2. Step 2: Convert to fraction form
    3,913.76/5,400.72 = 2,299.20/x
  3. Step 3: Cross multiply
    3,913.76x = 5,400.72 × 2,299.20
  4. Step 4: Simplify right side
    3,913.76x = 12,417,335.42
  5. Step 5: Solve for x
    x = 12,417,335.42/3,913.76
  6. Step 6: Final answer
    x = 3,172.74

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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.