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Finding the Fourth Proportional to 707.38, 1,059.84 and 681.86

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Solution

The fourth proportional to 707.38, 1,059.84 and 681.86 is: 1,021.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.38 : 1,059.84 = 681.86 : x
  2. Step 2: Convert to fraction form
    707.38/1,059.84 = 681.86/x
  3. Step 3: Cross multiply
    707.38x = 1,059.84 × 681.86
  4. Step 4: Simplify right side
    707.38x = 722,665.15
  5. Step 5: Solve for x
    x = 722,665.15/707.38
  6. Step 6: Final answer
    x = 1,021.61

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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.