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Finding the Fourth Proportional to 708.36, 979.74 and 671.94

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Solution

The fourth proportional to 708.36, 979.74 and 671.94 is: 929.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.36 : 979.74 = 671.94 : x
  2. Step 2: Convert to fraction form
    708.36/979.74 = 671.94/x
  3. Step 3: Cross multiply
    708.36x = 979.74 × 671.94
  4. Step 4: Simplify right side
    708.36x = 658,326.50
  5. Step 5: Solve for x
    x = 658,326.50/708.36
  6. Step 6: Final answer
    x = 929.37

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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.