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Finding the Fourth Proportional to 626.11, 938.66 and 430.51

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Solution

The fourth proportional to 626.11, 938.66 and 430.51 is: 645.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.11 : 938.66 = 430.51 : x
  2. Step 2: Convert to fraction form
    626.11/938.66 = 430.51/x
  3. Step 3: Cross multiply
    626.11x = 938.66 × 430.51
  4. Step 4: Simplify right side
    626.11x = 404,100.36
  5. Step 5: Solve for x
    x = 404,100.36/626.11
  6. Step 6: Final answer
    x = 645.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.