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Finding the Fourth Proportional to 860.76, 1,292.92 and 696.41

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Solution

The fourth proportional to 860.76, 1,292.92 and 696.41 is: 1,046.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.76 : 1,292.92 = 696.41 : x
  2. Step 2: Convert to fraction form
    860.76/1,292.92 = 696.41/x
  3. Step 3: Cross multiply
    860.76x = 1,292.92 × 696.41
  4. Step 4: Simplify right side
    860.76x = 900,402.42
  5. Step 5: Solve for x
    x = 900,402.42/860.76
  6. Step 6: Final answer
    x = 1,046.06

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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.