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Finding the Fourth Proportional to 175.30, 262.71 and 138.79

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Solution

The fourth proportional to 175.30, 262.71 and 138.79 is: 207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.30 : 262.71 = 138.79 : x
  2. Step 2: Convert to fraction form
    175.30/262.71 = 138.79/x
  3. Step 3: Cross multiply
    175.30x = 262.71 × 138.79
  4. Step 4: Simplify right side
    175.30x = 36,461.52
  5. Step 5: Solve for x
    x = 36,461.52/175.30
  6. Step 6: Final answer
    x = 207.99

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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.