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Finding the Fourth Proportional to 695.22, 1,042.78 and 233.30

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Solution

The fourth proportional to 695.22, 1,042.78 and 233.30 is: 349.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.22 : 1,042.78 = 233.30 : x
  2. Step 2: Convert to fraction form
    695.22/1,042.78 = 233.30/x
  3. Step 3: Cross multiply
    695.22x = 1,042.78 × 233.30
  4. Step 4: Simplify right side
    695.22x = 243,280.57
  5. Step 5: Solve for x
    x = 243,280.57/695.22
  6. Step 6: Final answer
    x = 349.93

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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.