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Finding the Fourth Proportional to 891.41, 1,336.10 and 526.91

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Solution

The fourth proportional to 891.41, 1,336.10 and 526.91 is: 789.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.41 : 1,336.10 = 526.91 : x
  2. Step 2: Convert to fraction form
    891.41/1,336.10 = 526.91/x
  3. Step 3: Cross multiply
    891.41x = 1,336.10 × 526.91
  4. Step 4: Simplify right side
    891.41x = 703,995.14
  5. Step 5: Solve for x
    x = 703,995.14/891.41
  6. Step 6: Final answer
    x = 789.76

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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.