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Finding the Fourth Proportional to 3,189.87, 4,781.16 and 1,548

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Solution

The fourth proportional to 3,189.87, 4,781.16 and 1,548 is: 2,320.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.87 : 4,781.16 = 1,548 : x
  2. Step 2: Convert to fraction form
    3,189.87/4,781.16 = 1,548/x
  3. Step 3: Cross multiply
    3,189.87x = 4,781.16 × 1,548
  4. Step 4: Simplify right side
    3,189.87x = 7,401,235.68
  5. Step 5: Solve for x
    x = 7,401,235.68/3,189.87
  6. Step 6: Final answer
    x = 2,320.23

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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.