Home / 3,720.78-5,580.36-1,123.11

Finding the Fourth Proportional to 3,720.78, 5,580.36 and 1,123.11

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Solution

The fourth proportional to 3,720.78, 5,580.36 and 1,123.11 is: 1,684.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.78 : 5,580.36 = 1,123.11 : x
  2. Step 2: Convert to fraction form
    3,720.78/5,580.36 = 1,123.11/x
  3. Step 3: Cross multiply
    3,720.78x = 5,580.36 × 1,123.11
  4. Step 4: Simplify right side
    3,720.78x = 6,267,358.12
  5. Step 5: Solve for x
    x = 6,267,358.12/3,720.78
  6. Step 6: Final answer
    x = 1,684.42

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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.