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Finding the Fourth Proportional to 696.42, 961.08 and 381.70

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Solution

The fourth proportional to 696.42, 961.08 and 381.70 is: 526.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.42 : 961.08 = 381.70 : x
  2. Step 2: Convert to fraction form
    696.42/961.08 = 381.70/x
  3. Step 3: Cross multiply
    696.42x = 961.08 × 381.70
  4. Step 4: Simplify right side
    696.42x = 366,844.24
  5. Step 5: Solve for x
    x = 366,844.24/696.42
  6. Step 6: Final answer
    x = 526.76

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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.