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Finding the Fourth Proportional to 626.12, 862.81 and 501.79

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Solution

The fourth proportional to 626.12, 862.81 and 501.79 is: 691.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 862.81 = 501.79 : x
  2. Step 2: Convert to fraction form
    626.12/862.81 = 501.79/x
  3. Step 3: Cross multiply
    626.12x = 862.81 × 501.79
  4. Step 4: Simplify right side
    626.12x = 432,949.43
  5. Step 5: Solve for x
    x = 432,949.43/626.12
  6. Step 6: Final answer
    x = 691.48

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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.