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Finding the Fourth Proportional to 695.76, 960.36 and 401.22

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Solution

The fourth proportional to 695.76, 960.36 and 401.22 is: 553.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.76 : 960.36 = 401.22 : x
  2. Step 2: Convert to fraction form
    695.76/960.36 = 401.22/x
  3. Step 3: Cross multiply
    695.76x = 960.36 × 401.22
  4. Step 4: Simplify right side
    695.76x = 385,315.64
  5. Step 5: Solve for x
    x = 385,315.64/695.76
  6. Step 6: Final answer
    x = 553.81

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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.