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Finding the Fourth Proportional to 855.85, 1,181.91 and 590.97

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Solution

The fourth proportional to 855.85, 1,181.91 and 590.97 is: 816.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.85 : 1,181.91 = 590.97 : x
  2. Step 2: Convert to fraction form
    855.85/1,181.91 = 590.97/x
  3. Step 3: Cross multiply
    855.85x = 1,181.91 × 590.97
  4. Step 4: Simplify right side
    855.85x = 698,478.34
  5. Step 5: Solve for x
    x = 698,478.34/855.85
  6. Step 6: Final answer
    x = 816.12

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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.