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Finding the Fourth Proportional to 891.54, 1,336.10 and 371.21

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Solution

The fourth proportional to 891.54, 1,336.10 and 371.21 is: 556.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.54 : 1,336.10 = 371.21 : x
  2. Step 2: Convert to fraction form
    891.54/1,336.10 = 371.21/x
  3. Step 3: Cross multiply
    891.54x = 1,336.10 × 371.21
  4. Step 4: Simplify right side
    891.54x = 495,965.14
  5. Step 5: Solve for x
    x = 495,965.14/891.54
  6. Step 6: Final answer
    x = 556.30

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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.