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Finding the Fourth Proportional to 762.78, 1,052.19 and 447.97

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Solution

The fourth proportional to 762.78, 1,052.19 and 447.97 is: 617.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.78 : 1,052.19 = 447.97 : x
  2. Step 2: Convert to fraction form
    762.78/1,052.19 = 447.97/x
  3. Step 3: Cross multiply
    762.78x = 1,052.19 × 447.97
  4. Step 4: Simplify right side
    762.78x = 471,349.55
  5. Step 5: Solve for x
    x = 471,349.55/762.78
  6. Step 6: Final answer
    x = 617.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.