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Finding the Fourth Proportional to 517.88, 776.81 and 133.13

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Solution

The fourth proportional to 517.88, 776.81 and 133.13 is: 199.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.88 : 776.81 = 133.13 : x
  2. Step 2: Convert to fraction form
    517.88/776.81 = 133.13/x
  3. Step 3: Cross multiply
    517.88x = 776.81 × 133.13
  4. Step 4: Simplify right side
    517.88x = 103,416.72
  5. Step 5: Solve for x
    x = 103,416.72/517.88
  6. Step 6: Final answer
    x = 199.69

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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.