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Finding the Fourth Proportional to 508, 761.81 and 199.82

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Solution

The fourth proportional to 508, 761.81 and 199.82 is: 299.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    508 : 761.81 = 199.82 : x
  2. Step 2: Convert to fraction form
    508/761.81 = 199.82/x
  3. Step 3: Cross multiply
    508x = 761.81 × 199.82
  4. Step 4: Simplify right side
    508x = 152,224.87
  5. Step 5: Solve for x
    x = 152,224.87/508
  6. Step 6: Final answer
    x = 299.66

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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.