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Finding the Fourth Proportional to 891.77, 1,338.13 and 336.86

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Solution

The fourth proportional to 891.77, 1,338.13 and 336.86 is: 505.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.77 : 1,338.13 = 336.86 : x
  2. Step 2: Convert to fraction form
    891.77/1,338.13 = 336.86/x
  3. Step 3: Cross multiply
    891.77x = 1,338.13 × 336.86
  4. Step 4: Simplify right side
    891.77x = 450,761.69
  5. Step 5: Solve for x
    x = 450,761.69/891.77
  6. Step 6: Final answer
    x = 505.47

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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.