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Finding the Fourth Proportional to 333.28, 499.92 and 89.81

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Solution

The fourth proportional to 333.28, 499.92 and 89.81 is: 134.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.28 : 499.92 = 89.81 : x
  2. Step 2: Convert to fraction form
    333.28/499.92 = 89.81/x
  3. Step 3: Cross multiply
    333.28x = 499.92 × 89.81
  4. Step 4: Simplify right side
    333.28x = 44,897.82
  5. Step 5: Solve for x
    x = 44,897.82/333.28
  6. Step 6: Final answer
    x = 134.72

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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.