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Finding the Fourth Proportional to 891.36, 1,336.76 and 371.36

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Solution

The fourth proportional to 891.36, 1,336.76 and 371.36 is: 556.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.36 : 1,336.76 = 371.36 : x
  2. Step 2: Convert to fraction form
    891.36/1,336.76 = 371.36/x
  3. Step 3: Cross multiply
    891.36x = 1,336.76 × 371.36
  4. Step 4: Simplify right side
    891.36x = 496,419.19
  5. Step 5: Solve for x
    x = 496,419.19/891.36
  6. Step 6: Final answer
    x = 556.92

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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.