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Finding the Fourth Proportional to 709.73, 979.73 and 551.98

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Solution

The fourth proportional to 709.73, 979.73 and 551.98 is: 761.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.73 : 979.73 = 551.98 : x
  2. Step 2: Convert to fraction form
    709.73/979.73 = 551.98/x
  3. Step 3: Cross multiply
    709.73x = 979.73 × 551.98
  4. Step 4: Simplify right side
    709.73x = 540,791.37
  5. Step 5: Solve for x
    x = 540,791.37/709.73
  6. Step 6: Final answer
    x = 761.97

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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.