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Finding the Fourth Proportional to 617.08, 857.29 and 611.44

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Solution

The fourth proportional to 617.08, 857.29 and 611.44 is: 849.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.08 : 857.29 = 611.44 : x
  2. Step 2: Convert to fraction form
    617.08/857.29 = 611.44/x
  3. Step 3: Cross multiply
    617.08x = 857.29 × 611.44
  4. Step 4: Simplify right side
    617.08x = 524,181.40
  5. Step 5: Solve for x
    x = 524,181.40/617.08
  6. Step 6: Final answer
    x = 849.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.