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Finding the Fourth Proportional to 638.09, 952.81 and 506.61

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Solution

The fourth proportional to 638.09, 952.81 and 506.61 is: 756.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.09 : 952.81 = 506.61 : x
  2. Step 2: Convert to fraction form
    638.09/952.81 = 506.61/x
  3. Step 3: Cross multiply
    638.09x = 952.81 × 506.61
  4. Step 4: Simplify right side
    638.09x = 482,707.28
  5. Step 5: Solve for x
    x = 482,707.28/638.09
  6. Step 6: Final answer
    x = 756.49

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.