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Finding the Fourth Proportional to 695.22, 1,042.80 and 233.28

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Solution

The fourth proportional to 695.22, 1,042.80 and 233.28 is: 349.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.22 : 1,042.80 = 233.28 : x
  2. Step 2: Convert to fraction form
    695.22/1,042.80 = 233.28/x
  3. Step 3: Cross multiply
    695.22x = 1,042.80 × 233.28
  4. Step 4: Simplify right side
    695.22x = 243,264.38
  5. Step 5: Solve for x
    x = 243,264.38/695.22
  6. Step 6: Final answer
    x = 349.91

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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.