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Finding the Fourth Proportional to 747.49, 1,121.23 and 336.55

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Solution

The fourth proportional to 747.49, 1,121.23 and 336.55 is: 504.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.49 : 1,121.23 = 336.55 : x
  2. Step 2: Convert to fraction form
    747.49/1,121.23 = 336.55/x
  3. Step 3: Cross multiply
    747.49x = 1,121.23 × 336.55
  4. Step 4: Simplify right side
    747.49x = 377,344.35
  5. Step 5: Solve for x
    x = 377,344.35/747.49
  6. Step 6: Final answer
    x = 504.82

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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.