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Finding the Fourth Proportional to 611.54, 843.77 and 415.31

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Solution

The fourth proportional to 611.54, 843.77 and 415.31 is: 573.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.54 : 843.77 = 415.31 : x
  2. Step 2: Convert to fraction form
    611.54/843.77 = 415.31/x
  3. Step 3: Cross multiply
    611.54x = 843.77 × 415.31
  4. Step 4: Simplify right side
    611.54x = 350,426.12
  5. Step 5: Solve for x
    x = 350,426.12/611.54
  6. Step 6: Final answer
    x = 573.02

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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.