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Finding the Fourth Proportional to 688.09, 1,032.17 and 201.18

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Solution

The fourth proportional to 688.09, 1,032.17 and 201.18 is: 301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.09 : 1,032.17 = 201.18 : x
  2. Step 2: Convert to fraction form
    688.09/1,032.17 = 201.18/x
  3. Step 3: Cross multiply
    688.09x = 1,032.17 × 201.18
  4. Step 4: Simplify right side
    688.09x = 207,651.96
  5. Step 5: Solve for x
    x = 207,651.96/688.09
  6. Step 6: Final answer
    x = 301.78

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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.