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Finding the Fourth Proportional to 202.58, 303.87 and 72.58

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Solution

The fourth proportional to 202.58, 303.87 and 72.58 is: 108.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.58 : 303.87 = 72.58 : x
  2. Step 2: Convert to fraction form
    202.58/303.87 = 72.58/x
  3. Step 3: Cross multiply
    202.58x = 303.87 × 72.58
  4. Step 4: Simplify right side
    202.58x = 22,054.88
  5. Step 5: Solve for x
    x = 22,054.88/202.58
  6. Step 6: Final answer
    x = 108.87

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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.