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Finding the Fourth Proportional to 730.20, 1,008.11 and 564.09

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Solution

The fourth proportional to 730.20, 1,008.11 and 564.09 is: 778.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.20 : 1,008.11 = 564.09 : x
  2. Step 2: Convert to fraction form
    730.20/1,008.11 = 564.09/x
  3. Step 3: Cross multiply
    730.20x = 1,008.11 × 564.09
  4. Step 4: Simplify right side
    730.20x = 568,664.77
  5. Step 5: Solve for x
    x = 568,664.77/730.20
  6. Step 6: Final answer
    x = 778.78

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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.