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Finding the Fourth Proportional to 626.69, 864.20 and 377.96

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Solution

The fourth proportional to 626.69, 864.20 and 377.96 is: 521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.69 : 864.20 = 377.96 : x
  2. Step 2: Convert to fraction form
    626.69/864.20 = 377.96/x
  3. Step 3: Cross multiply
    626.69x = 864.20 × 377.96
  4. Step 4: Simplify right side
    626.69x = 326,631.14
  5. Step 5: Solve for x
    x = 326,631.14/626.69
  6. Step 6: Final answer
    x = 521.20

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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.