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Finding the Fourth Proportional to 708.09, 1,062.69 and 379.41

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Solution

The fourth proportional to 708.09, 1,062.69 and 379.41 is: 569.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.09 : 1,062.69 = 379.41 : x
  2. Step 2: Convert to fraction form
    708.09/1,062.69 = 379.41/x
  3. Step 3: Cross multiply
    708.09x = 1,062.69 × 379.41
  4. Step 4: Simplify right side
    708.09x = 403,195.21
  5. Step 5: Solve for x
    x = 403,195.21/708.09
  6. Step 6: Final answer
    x = 569.41

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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.