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Finding the Fourth Proportional to 3,909.87, 5,862.91 and 1,445.85

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Solution

The fourth proportional to 3,909.87, 5,862.91 and 1,445.85 is: 2,168.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.87 : 5,862.91 = 1,445.85 : x
  2. Step 2: Convert to fraction form
    3,909.87/5,862.91 = 1,445.85/x
  3. Step 3: Cross multiply
    3,909.87x = 5,862.91 × 1,445.85
  4. Step 4: Simplify right side
    3,909.87x = 8,476,888.42
  5. Step 5: Solve for x
    x = 8,476,888.42/3,909.87
  6. Step 6: Final answer
    x = 2,168.07

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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.