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Finding the Fourth Proportional to 626.74, 864.84 and 378.04

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Solution

The fourth proportional to 626.74, 864.84 and 378.04 is: 521.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.74 : 864.84 = 378.04 : x
  2. Step 2: Convert to fraction form
    626.74/864.84 = 378.04/x
  3. Step 3: Cross multiply
    626.74x = 864.84 × 378.04
  4. Step 4: Simplify right side
    626.74x = 326,944.11
  5. Step 5: Solve for x
    x = 326,944.11/626.74
  6. Step 6: Final answer
    x = 521.66

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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.