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Finding the Fourth Proportional to 516.99, 711.93 and 385.77

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Solution

The fourth proportional to 516.99, 711.93 and 385.77 is: 531.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.99 : 711.93 = 385.77 : x
  2. Step 2: Convert to fraction form
    516.99/711.93 = 385.77/x
  3. Step 3: Cross multiply
    516.99x = 711.93 × 385.77
  4. Step 4: Simplify right side
    516.99x = 274,641.24
  5. Step 5: Solve for x
    x = 274,641.24/516.99
  6. Step 6: Final answer
    x = 531.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.