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Finding the Fourth Proportional to 782.25, 1,174.25 and 550.18

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Solution

The fourth proportional to 782.25, 1,174.25 and 550.18 is: 825.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.25 : 1,174.25 = 550.18 : x
  2. Step 2: Convert to fraction form
    782.25/1,174.25 = 550.18/x
  3. Step 3: Cross multiply
    782.25x = 1,174.25 × 550.18
  4. Step 4: Simplify right side
    782.25x = 646,048.87
  5. Step 5: Solve for x
    x = 646,048.87/782.25
  6. Step 6: Final answer
    x = 825.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.