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Finding the Fourth Proportional to 2,239.40, 3,359.57 and 679.31

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Solution

The fourth proportional to 2,239.40, 3,359.57 and 679.31 is: 1,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.40 : 3,359.57 = 679.31 : x
  2. Step 2: Convert to fraction form
    2,239.40/3,359.57 = 679.31/x
  3. Step 3: Cross multiply
    2,239.40x = 3,359.57 × 679.31
  4. Step 4: Simplify right side
    2,239.40x = 2,282,169.30
  5. Step 5: Solve for x
    x = 2,282,169.30/2,239.40
  6. Step 6: Final answer
    x = 1,019.10

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1.5x scale

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.