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Finding the Fourth Proportional to 626.51, 939.99 and 383.21

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Solution

The fourth proportional to 626.51, 939.99 and 383.21 is: 574.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.51 : 939.99 = 383.21 : x
  2. Step 2: Convert to fraction form
    626.51/939.99 = 383.21/x
  3. Step 3: Cross multiply
    626.51x = 939.99 × 383.21
  4. Step 4: Simplify right side
    626.51x = 360,213.57
  5. Step 5: Solve for x
    x = 360,213.57/626.51
  6. Step 6: Final answer
    x = 574.95

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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.