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Finding the Fourth Proportional to 695.76, 960.24 and 400.96

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Solution

The fourth proportional to 695.76, 960.24 and 400.96 is: 553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.76 : 960.24 = 400.96 : x
  2. Step 2: Convert to fraction form
    695.76/960.24 = 400.96/x
  3. Step 3: Cross multiply
    695.76x = 960.24 × 400.96
  4. Step 4: Simplify right side
    695.76x = 385,020.53
  5. Step 5: Solve for x
    x = 385,020.53/695.76
  6. Step 6: Final answer
    x = 553.38

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1.5x scale

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.