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Finding the Fourth Proportional to 611.86, 843.73 and 425.56

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Solution

The fourth proportional to 611.86, 843.73 and 425.56 is: 586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.86 : 843.73 = 425.56 : x
  2. Step 2: Convert to fraction form
    611.86/843.73 = 425.56/x
  3. Step 3: Cross multiply
    611.86x = 843.73 × 425.56
  4. Step 4: Simplify right side
    611.86x = 359,057.74
  5. Step 5: Solve for x
    x = 359,057.74/611.86
  6. Step 6: Final answer
    x = 586.83

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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.