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Finding the Fourth Proportional to 708.26, 1,060.85 and 342.28

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Solution

The fourth proportional to 708.26, 1,060.85 and 342.28 is: 512.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.26 : 1,060.85 = 342.28 : x
  2. Step 2: Convert to fraction form
    708.26/1,060.85 = 342.28/x
  3. Step 3: Cross multiply
    708.26x = 1,060.85 × 342.28
  4. Step 4: Simplify right side
    708.26x = 363,109.92
  5. Step 5: Solve for x
    x = 363,109.92/708.26
  6. Step 6: Final answer
    x = 512.68

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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.