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Finding the Fourth Proportional to 688.05, 1,032.12 and 201.15

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Solution

The fourth proportional to 688.05, 1,032.12 and 201.15 is: 301.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.05 : 1,032.12 = 201.15 : x
  2. Step 2: Convert to fraction form
    688.05/1,032.12 = 201.15/x
  3. Step 3: Cross multiply
    688.05x = 1,032.12 × 201.15
  4. Step 4: Simplify right side
    688.05x = 207,610.94
  5. Step 5: Solve for x
    x = 207,610.94/688.05
  6. Step 6: Final answer
    x = 301.74

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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.