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Finding the Fourth Proportional to 175.48, 262.88 and 139.30

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Solution

The fourth proportional to 175.48, 262.88 and 139.30 is: 208.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.48 : 262.88 = 139.30 : x
  2. Step 2: Convert to fraction form
    175.48/262.88 = 139.30/x
  3. Step 3: Cross multiply
    175.48x = 262.88 × 139.30
  4. Step 4: Simplify right side
    175.48x = 36,619.18
  5. Step 5: Solve for x
    x = 36,619.18/175.48
  6. Step 6: Final answer
    x = 208.68

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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.