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Finding the Fourth Proportional to 175.15, 262.65 and 72.40

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Solution

The fourth proportional to 175.15, 262.65 and 72.40 is: 108.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.15 : 262.65 = 72.40 : x
  2. Step 2: Convert to fraction form
    175.15/262.65 = 72.40/x
  3. Step 3: Cross multiply
    175.15x = 262.65 × 72.40
  4. Step 4: Simplify right side
    175.15x = 19,015.86
  5. Step 5: Solve for x
    x = 19,015.86/175.15
  6. Step 6: Final answer
    x = 108.57

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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.