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Finding the Fourth Proportional to 694.55, 958.47 and 379.85

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Solution

The fourth proportional to 694.55, 958.47 and 379.85 is: 524.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.55 : 958.47 = 379.85 : x
  2. Step 2: Convert to fraction form
    694.55/958.47 = 379.85/x
  3. Step 3: Cross multiply
    694.55x = 958.47 × 379.85
  4. Step 4: Simplify right side
    694.55x = 364,070.04
  5. Step 5: Solve for x
    x = 364,070.04/694.55
  6. Step 6: Final answer
    x = 524.18

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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.