Home / 3,686.68-5,530.80-1,221.70

Finding the Fourth Proportional to 3,686.68, 5,530.80 and 1,221.70

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Solution

The fourth proportional to 3,686.68, 5,530.80 and 1,221.70 is: 1,832.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.68 : 5,530.80 = 1,221.70 : x
  2. Step 2: Convert to fraction form
    3,686.68/5,530.80 = 1,221.70/x
  3. Step 3: Cross multiply
    3,686.68x = 5,530.80 × 1,221.70
  4. Step 4: Simplify right side
    3,686.68x = 6,756,978.36
  5. Step 5: Solve for x
    x = 6,756,978.36/3,686.68
  6. Step 6: Final answer
    x = 1,832.81

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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.