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Finding the Fourth Proportional to 891.73, 1,334.90 and 613.49

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Solution

The fourth proportional to 891.73, 1,334.90 and 613.49 is: 918.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.73 : 1,334.90 = 613.49 : x
  2. Step 2: Convert to fraction form
    891.73/1,334.90 = 613.49/x
  3. Step 3: Cross multiply
    891.73x = 1,334.90 × 613.49
  4. Step 4: Simplify right side
    891.73x = 818,947.80
  5. Step 5: Solve for x
    x = 818,947.80/891.73
  6. Step 6: Final answer
    x = 918.38

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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.