Home / 2,220.51-3,330.94-639.17

Finding the Fourth Proportional to 2,220.51, 3,330.94 and 639.17

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Solution

The fourth proportional to 2,220.51, 3,330.94 and 639.17 is: 958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.51 : 3,330.94 = 639.17 : x
  2. Step 2: Convert to fraction form
    2,220.51/3,330.94 = 639.17/x
  3. Step 3: Cross multiply
    2,220.51x = 3,330.94 × 639.17
  4. Step 4: Simplify right side
    2,220.51x = 2,129,033.72
  5. Step 5: Solve for x
    x = 2,129,033.72/2,220.51
  6. Step 6: Final answer
    x = 958.80

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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.