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Finding the Fourth Proportional to 630.36, 944.75 and 447.80

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Solution

The fourth proportional to 630.36, 944.75 and 447.80 is: 671.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.36 : 944.75 = 447.80 : x
  2. Step 2: Convert to fraction form
    630.36/944.75 = 447.80/x
  3. Step 3: Cross multiply
    630.36x = 944.75 × 447.80
  4. Step 4: Simplify right side
    630.36x = 423,052.09
  5. Step 5: Solve for x
    x = 423,052.09/630.36
  6. Step 6: Final answer
    x = 671.13

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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.