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Finding the Fourth Proportional to 499.81, 749.90 and 243.13

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Solution

The fourth proportional to 499.81, 749.90 and 243.13 is: 364.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.81 : 749.90 = 243.13 : x
  2. Step 2: Convert to fraction form
    499.81/749.90 = 243.13/x
  3. Step 3: Cross multiply
    499.81x = 749.90 × 243.13
  4. Step 4: Simplify right side
    499.81x = 182,323.19
  5. Step 5: Solve for x
    x = 182,323.19/499.81
  6. Step 6: Final answer
    x = 364.78

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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.