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Finding the Fourth Proportional to 695.64, 960.08 and 400.84

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Solution

The fourth proportional to 695.64, 960.08 and 400.84 is: 553.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.64 : 960.08 = 400.84 : x
  2. Step 2: Convert to fraction form
    695.64/960.08 = 400.84/x
  3. Step 3: Cross multiply
    695.64x = 960.08 × 400.84
  4. Step 4: Simplify right side
    695.64x = 384,838.47
  5. Step 5: Solve for x
    x = 384,838.47/695.64
  6. Step 6: Final answer
    x = 553.21

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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.