Home / 1,439.74-2,159.30-399.46

Finding the Fourth Proportional to 1,439.74, 2,159.30 and 399.46

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Solution

The fourth proportional to 1,439.74, 2,159.30 and 399.46 is: 599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.74 : 2,159.30 = 399.46 : x
  2. Step 2: Convert to fraction form
    1,439.74/2,159.30 = 399.46/x
  3. Step 3: Cross multiply
    1,439.74x = 2,159.30 × 399.46
  4. Step 4: Simplify right side
    1,439.74x = 862,553.98
  5. Step 5: Solve for x
    x = 862,553.98/1,439.74
  6. Step 6: Final answer
    x = 599.10

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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.