Home / 3,679.20-5,518.81-905.93

Finding the Fourth Proportional to 3,679.20, 5,518.81 and 905.93

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Solution

The fourth proportional to 3,679.20, 5,518.81 and 905.93 is: 1,358.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.20 : 5,518.81 = 905.93 : x
  2. Step 2: Convert to fraction form
    3,679.20/5,518.81 = 905.93/x
  3. Step 3: Cross multiply
    3,679.20x = 5,518.81 × 905.93
  4. Step 4: Simplify right side
    3,679.20x = 4,999,678.27
  5. Step 5: Solve for x
    x = 4,999,678.27/3,679.20
  6. Step 6: Final answer
    x = 1,358.90

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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.