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Finding the Fourth Proportional to 891.14, 1,334.59 and 760.43

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Solution

The fourth proportional to 891.14, 1,334.59 and 760.43 is: 1,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.14 : 1,334.59 = 760.43 : x
  2. Step 2: Convert to fraction form
    891.14/1,334.59 = 760.43/x
  3. Step 3: Cross multiply
    891.14x = 1,334.59 × 760.43
  4. Step 4: Simplify right side
    891.14x = 1,014,863.71
  5. Step 5: Solve for x
    x = 1,014,863.71/891.14
  6. Step 6: Final answer
    x = 1,138.83

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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.