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Finding the Fourth Proportional to 3,870.55, 5,805.81 and 2,634.90

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Solution

The fourth proportional to 3,870.55, 5,805.81 and 2,634.90 is: 3,952.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.55 : 5,805.81 = 2,634.90 : x
  2. Step 2: Convert to fraction form
    3,870.55/5,805.81 = 2,634.90/x
  3. Step 3: Cross multiply
    3,870.55x = 5,805.81 × 2,634.90
  4. Step 4: Simplify right side
    3,870.55x = 15,297,707.00
  5. Step 5: Solve for x
    x = 15,297,707.00/3,870.55
  6. Step 6: Final answer
    x = 3,952.33

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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.