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Finding the Fourth Proportional to 202.61, 303.89 and 65.67

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Solution

The fourth proportional to 202.61, 303.89 and 65.67 is: 98.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.61 : 303.89 = 65.67 : x
  2. Step 2: Convert to fraction form
    202.61/303.89 = 65.67/x
  3. Step 3: Cross multiply
    202.61x = 303.89 × 65.67
  4. Step 4: Simplify right side
    202.61x = 19,956.13
  5. Step 5: Solve for x
    x = 19,956.13/202.61
  6. Step 6: Final answer
    x = 98.50

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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.