Home / 2,205.90-3,308.73-666.78

Finding the Fourth Proportional to 2,205.90, 3,308.73 and 666.78

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Solution

The fourth proportional to 2,205.90, 3,308.73 and 666.78 is: 1,000.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.90 : 3,308.73 = 666.78 : x
  2. Step 2: Convert to fraction form
    2,205.90/3,308.73 = 666.78/x
  3. Step 3: Cross multiply
    2,205.90x = 3,308.73 × 666.78
  4. Step 4: Simplify right side
    2,205.90x = 2,206,194.99
  5. Step 5: Solve for x
    x = 2,206,194.99/2,205.90
  6. Step 6: Final answer
    x = 1,000.13

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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.