Home / 1,439.45-2,158.92-399.55

Finding the Fourth Proportional to 1,439.45, 2,158.92 and 399.55

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Solution

The fourth proportional to 1,439.45, 2,158.92 and 399.55 is: 599.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.45 : 2,158.92 = 399.55 : x
  2. Step 2: Convert to fraction form
    1,439.45/2,158.92 = 399.55/x
  3. Step 3: Cross multiply
    1,439.45x = 2,158.92 × 399.55
  4. Step 4: Simplify right side
    1,439.45x = 862,585.69
  5. Step 5: Solve for x
    x = 862,585.69/1,439.45
  6. Step 6: Final answer
    x = 599.25

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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.