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Finding the Fourth Proportional to 2,562.90, 3,843.81 and 919.55

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Solution

The fourth proportional to 2,562.90, 3,843.81 and 919.55 is: 1,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,562.90 : 3,843.81 = 919.55 : x
  2. Step 2: Convert to fraction form
    2,562.90/3,843.81 = 919.55/x
  3. Step 3: Cross multiply
    2,562.90x = 3,843.81 × 919.55
  4. Step 4: Simplify right side
    2,562.90x = 3,534,556.27
  5. Step 5: Solve for x
    x = 3,534,556.27/2,562.90
  6. Step 6: Final answer
    x = 1,379.12

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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.