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Finding the Fourth Proportional to 2,239.96, 3,358.86 and 679.70

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Solution

The fourth proportional to 2,239.96, 3,358.86 and 679.70 is: 1,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.96 : 3,358.86 = 679.70 : x
  2. Step 2: Convert to fraction form
    2,239.96/3,358.86 = 679.70/x
  3. Step 3: Cross multiply
    2,239.96x = 3,358.86 × 679.70
  4. Step 4: Simplify right side
    2,239.96x = 2,283,017.14
  5. Step 5: Solve for x
    x = 2,283,017.14/2,239.96
  6. Step 6: Final answer
    x = 1,019.22

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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.