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Finding the Fourth Proportional to 3,889.59, 5,367.89 and 2,211.00

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Solution

The fourth proportional to 3,889.59, 5,367.89 and 2,211.00 is: 3,051.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.59 : 5,367.89 = 2,211.00 : x
  2. Step 2: Convert to fraction form
    3,889.59/5,367.89 = 2,211.00/x
  3. Step 3: Cross multiply
    3,889.59x = 5,367.89 × 2,211.00
  4. Step 4: Simplify right side
    3,889.59x = 11,868,390.19
  5. Step 5: Solve for x
    x = 11,868,390.19/3,889.59
  6. Step 6: Final answer
    x = 3,051.32

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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.