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Finding the Fourth Proportional to 708.39, 976.90 and 550.80

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Solution

The fourth proportional to 708.39, 976.90 and 550.80 is: 759.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.39 : 976.90 = 550.80 : x
  2. Step 2: Convert to fraction form
    708.39/976.90 = 550.80/x
  3. Step 3: Cross multiply
    708.39x = 976.90 × 550.80
  4. Step 4: Simplify right side
    708.39x = 538,076.52
  5. Step 5: Solve for x
    x = 538,076.52/708.39
  6. Step 6: Final answer
    x = 759.58

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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.