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Finding the Fourth Proportional to 696.39, 960.98 and 401.64

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Solution

The fourth proportional to 696.39, 960.98 and 401.64 is: 554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.39 : 960.98 = 401.64 : x
  2. Step 2: Convert to fraction form
    696.39/960.98 = 401.64/x
  3. Step 3: Cross multiply
    696.39x = 960.98 × 401.64
  4. Step 4: Simplify right side
    696.39x = 385,969.01
  5. Step 5: Solve for x
    x = 385,969.01/696.39
  6. Step 6: Final answer
    x = 554.24

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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.