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Finding the Fourth Proportional to 737.79, 1,105.78 and 543.63

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Solution

The fourth proportional to 737.79, 1,105.78 and 543.63 is: 814.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.79 : 1,105.78 = 543.63 : x
  2. Step 2: Convert to fraction form
    737.79/1,105.78 = 543.63/x
  3. Step 3: Cross multiply
    737.79x = 1,105.78 × 543.63
  4. Step 4: Simplify right side
    737.79x = 601,135.18
  5. Step 5: Solve for x
    x = 601,135.18/737.79
  6. Step 6: Final answer
    x = 814.78

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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.