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Finding the Fourth Proportional to 2,242.57, 3,363.84 and 780.69

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Solution

The fourth proportional to 2,242.57, 3,363.84 and 780.69 is: 1,171.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,242.57 : 3,363.84 = 780.69 : x
  2. Step 2: Convert to fraction form
    2,242.57/3,363.84 = 780.69/x
  3. Step 3: Cross multiply
    2,242.57x = 3,363.84 × 780.69
  4. Step 4: Simplify right side
    2,242.57x = 2,626,116.25
  5. Step 5: Solve for x
    x = 2,626,116.25/2,242.57
  6. Step 6: Final answer
    x = 1,171.03

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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.