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Finding the Fourth Proportional to 4,478.11, 6,719.87 and 3,556.87

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Solution

The fourth proportional to 4,478.11, 6,719.87 and 3,556.87 is: 5,337.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.11 : 6,719.87 = 3,556.87 : x
  2. Step 2: Convert to fraction form
    4,478.11/6,719.87 = 3,556.87/x
  3. Step 3: Cross multiply
    4,478.11x = 6,719.87 × 3,556.87
  4. Step 4: Simplify right side
    4,478.11x = 23,901,704.01
  5. Step 5: Solve for x
    x = 23,901,704.01/4,478.11
  6. Step 6: Final answer
    x = 5,337.45

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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.