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Finding the Fourth Proportional to 695.90, 960.09 and 401.10

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Solution

The fourth proportional to 695.90, 960.09 and 401.10 is: 553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.90 : 960.09 = 401.10 : x
  2. Step 2: Convert to fraction form
    695.90/960.09 = 401.10/x
  3. Step 3: Cross multiply
    695.90x = 960.09 × 401.10
  4. Step 4: Simplify right side
    695.90x = 385,092.10
  5. Step 5: Solve for x
    x = 385,092.10/695.90
  6. Step 6: Final answer
    x = 553.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.