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Finding the Fourth Proportional to 737.72, 1,105.10 and 445.06

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Solution

The fourth proportional to 737.72, 1,105.10 and 445.06 is: 666.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.72 : 1,105.10 = 445.06 : x
  2. Step 2: Convert to fraction form
    737.72/1,105.10 = 445.06/x
  3. Step 3: Cross multiply
    737.72x = 1,105.10 × 445.06
  4. Step 4: Simplify right side
    737.72x = 491,830.28
  5. Step 5: Solve for x
    x = 491,830.28/737.72
  6. Step 6: Final answer
    x = 666.69

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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.