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Finding the Fourth Proportional to 695.42, 1,042.51 and 330.02

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Solution

The fourth proportional to 695.42, 1,042.51 and 330.02 is: 494.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.42 : 1,042.51 = 330.02 : x
  2. Step 2: Convert to fraction form
    695.42/1,042.51 = 330.02/x
  3. Step 3: Cross multiply
    695.42x = 1,042.51 × 330.02
  4. Step 4: Simplify right side
    695.42x = 344,049.15
  5. Step 5: Solve for x
    x = 344,049.15/695.42
  6. Step 6: Final answer
    x = 494.74

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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.