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Finding the Fourth Proportional to 891.84, 1,337.78 and 275.47

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Solution

The fourth proportional to 891.84, 1,337.78 and 275.47 is: 413.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.84 : 1,337.78 = 275.47 : x
  2. Step 2: Convert to fraction form
    891.84/1,337.78 = 275.47/x
  3. Step 3: Cross multiply
    891.84x = 1,337.78 × 275.47
  4. Step 4: Simplify right side
    891.84x = 368,515.60
  5. Step 5: Solve for x
    x = 368,515.60/891.84
  6. Step 6: Final answer
    x = 413.21

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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.