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Finding the Fourth Proportional to 689.22, 1,033.98 and 202.23

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Solution

The fourth proportional to 689.22, 1,033.98 and 202.23 is: 303.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.22 : 1,033.98 = 202.23 : x
  2. Step 2: Convert to fraction form
    689.22/1,033.98 = 202.23/x
  3. Step 3: Cross multiply
    689.22x = 1,033.98 × 202.23
  4. Step 4: Simplify right side
    689.22x = 209,100.76
  5. Step 5: Solve for x
    x = 209,100.76/689.22
  6. Step 6: Final answer
    x = 303.39

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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.