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Finding the Fourth Proportional to 695.31, 1,042.82 and 201.66

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Solution

The fourth proportional to 695.31, 1,042.82 and 201.66 is: 302.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.31 : 1,042.82 = 201.66 : x
  2. Step 2: Convert to fraction form
    695.31/1,042.82 = 201.66/x
  3. Step 3: Cross multiply
    695.31x = 1,042.82 × 201.66
  4. Step 4: Simplify right side
    695.31x = 210,295.08
  5. Step 5: Solve for x
    x = 210,295.08/695.31
  6. Step 6: Final answer
    x = 302.45

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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.