Home / 2,220.13-3,330.15-987.22

Finding the Fourth Proportional to 2,220.13, 3,330.15 and 987.22

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Solution

The fourth proportional to 2,220.13, 3,330.15 and 987.22 is: 1,480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.13 : 3,330.15 = 987.22 : x
  2. Step 2: Convert to fraction form
    2,220.13/3,330.15 = 987.22/x
  3. Step 3: Cross multiply
    2,220.13x = 3,330.15 × 987.22
  4. Step 4: Simplify right side
    2,220.13x = 3,287,590.68
  5. Step 5: Solve for x
    x = 3,287,590.68/2,220.13
  6. Step 6: Final answer
    x = 1,480.81

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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.