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Finding the Fourth Proportional to 637.48, 879.78 and 539.56

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Solution

The fourth proportional to 637.48, 879.78 and 539.56 is: 744.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.48 : 879.78 = 539.56 : x
  2. Step 2: Convert to fraction form
    637.48/879.78 = 539.56/x
  3. Step 3: Cross multiply
    637.48x = 879.78 × 539.56
  4. Step 4: Simplify right side
    637.48x = 474,694.10
  5. Step 5: Solve for x
    x = 474,694.10/637.48
  6. Step 6: Final answer
    x = 744.64

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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.