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Finding the Fourth Proportional to 637.61, 879.45 and 448.25

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Solution

The fourth proportional to 637.61, 879.45 and 448.25 is: 618.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.61 : 879.45 = 448.25 : x
  2. Step 2: Convert to fraction form
    637.61/879.45 = 448.25/x
  3. Step 3: Cross multiply
    637.61x = 879.45 × 448.25
  4. Step 4: Simplify right side
    637.61x = 394,213.46
  5. Step 5: Solve for x
    x = 394,213.46/637.61
  6. Step 6: Final answer
    x = 618.27

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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.