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Finding the Fourth Proportional to 576.11, 789.50 and 520.76

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Solution

The fourth proportional to 576.11, 789.50 and 520.76 is: 713.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.11 : 789.50 = 520.76 : x
  2. Step 2: Convert to fraction form
    576.11/789.50 = 520.76/x
  3. Step 3: Cross multiply
    576.11x = 789.50 × 520.76
  4. Step 4: Simplify right side
    576.11x = 411,133.47
  5. Step 5: Solve for x
    x = 411,133.47/576.11
  6. Step 6: Final answer
    x = 713.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.