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Finding the Fourth Proportional to 695.62, 1,042.56 and 608.75

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Solution

The fourth proportional to 695.62, 1,042.56 and 608.75 is: 912.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.62 : 1,042.56 = 608.75 : x
  2. Step 2: Convert to fraction form
    695.62/1,042.56 = 608.75/x
  3. Step 3: Cross multiply
    695.62x = 1,042.56 × 608.75
  4. Step 4: Simplify right side
    695.62x = 634,653.19
  5. Step 5: Solve for x
    x = 634,653.19/695.62
  6. Step 6: Final answer
    x = 912.36

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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.