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Finding the Fourth Proportional to 695.38, 1,042.46 and 262.23

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Solution

The fourth proportional to 695.38, 1,042.46 and 262.23 is: 393.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.38 : 1,042.46 = 262.23 : x
  2. Step 2: Convert to fraction form
    695.38/1,042.46 = 262.23/x
  3. Step 3: Cross multiply
    695.38x = 1,042.46 × 262.23
  4. Step 4: Simplify right side
    695.38x = 273,364.29
  5. Step 5: Solve for x
    x = 273,364.29/695.38
  6. Step 6: Final answer
    x = 393.11

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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.