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Finding the Fourth Proportional to 640.93, 883.85 and 516.19

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Solution

The fourth proportional to 640.93, 883.85 and 516.19 is: 711.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.93 : 883.85 = 516.19 : x
  2. Step 2: Convert to fraction form
    640.93/883.85 = 516.19/x
  3. Step 3: Cross multiply
    640.93x = 883.85 × 516.19
  4. Step 4: Simplify right side
    640.93x = 456,233.61
  5. Step 5: Solve for x
    x = 456,233.61/640.93
  6. Step 6: Final answer
    x = 711.83

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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.