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Finding the Fourth Proportional to 695.69, 960.05 and 385.19

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Solution

The fourth proportional to 695.69, 960.05 and 385.19 is: 531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.69 : 960.05 = 385.19 : x
  2. Step 2: Convert to fraction form
    695.69/960.05 = 385.19/x
  3. Step 3: Cross multiply
    695.69x = 960.05 × 385.19
  4. Step 4: Simplify right side
    695.69x = 369,801.66
  5. Step 5: Solve for x
    x = 369,801.66/695.69
  6. Step 6: Final answer
    x = 531.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.