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Finding the Fourth Proportional to 3,987.62, 5,981.40 and 1,794.80

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Solution

The fourth proportional to 3,987.62, 5,981.40 and 1,794.80 is: 2,692.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.62 : 5,981.40 = 1,794.80 : x
  2. Step 2: Convert to fraction form
    3,987.62/5,981.40 = 1,794.80/x
  3. Step 3: Cross multiply
    3,987.62x = 5,981.40 × 1,794.80
  4. Step 4: Simplify right side
    3,987.62x = 10,735,416.72
  5. Step 5: Solve for x
    x = 10,735,416.72/3,987.62
  6. Step 6: Final answer
    x = 2,692.19

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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.