Home / 1,603.22-2,211.67-939.66

Finding the Fourth Proportional to 1,603.22, 2,211.67 and 939.66

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Solution

The fourth proportional to 1,603.22, 2,211.67 and 939.66 is: 1,296.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.22 : 2,211.67 = 939.66 : x
  2. Step 2: Convert to fraction form
    1,603.22/2,211.67 = 939.66/x
  3. Step 3: Cross multiply
    1,603.22x = 2,211.67 × 939.66
  4. Step 4: Simplify right side
    1,603.22x = 2,078,217.83
  5. Step 5: Solve for x
    x = 2,078,217.83/1,603.22
  6. Step 6: Final answer
    x = 1,296.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.