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Finding the Fourth Proportional to 138.00, 207 and 35.29

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Solution

The fourth proportional to 138.00, 207 and 35.29 is: 52.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.00 : 207 = 35.29 : x
  2. Step 2: Convert to fraction form
    138.00/207 = 35.29/x
  3. Step 3: Cross multiply
    138.00x = 207 × 35.29
  4. Step 4: Simplify right side
    138.00x = 7,305.29
  5. Step 5: Solve for x
    x = 7,305.29/138.00
  6. Step 6: Final answer
    x = 52.94

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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.