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Finding the Fourth Proportional to 539.69, 812.85 and 513.77

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Solution

The fourth proportional to 539.69, 812.85 and 513.77 is: 773.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.69 : 812.85 = 513.77 : x
  2. Step 2: Convert to fraction form
    539.69/812.85 = 513.77/x
  3. Step 3: Cross multiply
    539.69x = 812.85 × 513.77
  4. Step 4: Simplify right side
    539.69x = 417,613.88
  5. Step 5: Solve for x
    x = 417,613.88/539.69
  6. Step 6: Final answer
    x = 773.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.