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Finding the Fourth Proportional to 626.49, 864.57 and 377.82

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Solution

The fourth proportional to 626.49, 864.57 and 377.82 is: 521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.49 : 864.57 = 377.82 : x
  2. Step 2: Convert to fraction form
    626.49/864.57 = 377.82/x
  3. Step 3: Cross multiply
    626.49x = 864.57 × 377.82
  4. Step 4: Simplify right side
    626.49x = 326,651.84
  5. Step 5: Solve for x
    x = 326,651.84/626.49
  6. Step 6: Final answer
    x = 521.40

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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.