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Finding the Fourth Proportional to 3,868.04, 5,337.72 and 2,189.60

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Solution

The fourth proportional to 3,868.04, 5,337.72 and 2,189.60 is: 3,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.04 : 5,337.72 = 2,189.60 : x
  2. Step 2: Convert to fraction form
    3,868.04/5,337.72 = 2,189.60/x
  3. Step 3: Cross multiply
    3,868.04x = 5,337.72 × 2,189.60
  4. Step 4: Simplify right side
    3,868.04x = 11,687,471.71
  5. Step 5: Solve for x
    x = 11,687,471.71/3,868.04
  6. Step 6: Final answer
    x = 3,021.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.