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Finding the Fourth Proportional to 638.36, 954.96 and 540.26

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Solution

The fourth proportional to 638.36, 954.96 and 540.26 is: 808.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.36 : 954.96 = 540.26 : x
  2. Step 2: Convert to fraction form
    638.36/954.96 = 540.26/x
  3. Step 3: Cross multiply
    638.36x = 954.96 × 540.26
  4. Step 4: Simplify right side
    638.36x = 515,926.69
  5. Step 5: Solve for x
    x = 515,926.69/638.36
  6. Step 6: Final answer
    x = 808.21

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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.