Home / 1,439.24-2,155.01-822.42

Finding the Fourth Proportional to 1,439.24, 2,155.01 and 822.42

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Solution

The fourth proportional to 1,439.24, 2,155.01 and 822.42 is: 1,231.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.24 : 2,155.01 = 822.42 : x
  2. Step 2: Convert to fraction form
    1,439.24/2,155.01 = 822.42/x
  3. Step 3: Cross multiply
    1,439.24x = 2,155.01 × 822.42
  4. Step 4: Simplify right side
    1,439.24x = 1,772,319.21
  5. Step 5: Solve for x
    x = 1,772,319.21/1,439.24
  6. Step 6: Final answer
    x = 1,231.43

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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.