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Finding the Fourth Proportional to 639.54, 883.76 and 544.96

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Solution

The fourth proportional to 639.54, 883.76 and 544.96 is: 753.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.54 : 883.76 = 544.96 : x
  2. Step 2: Convert to fraction form
    639.54/883.76 = 544.96/x
  3. Step 3: Cross multiply
    639.54x = 883.76 × 544.96
  4. Step 4: Simplify right side
    639.54x = 481,613.85
  5. Step 5: Solve for x
    x = 481,613.85/639.54
  6. Step 6: Final answer
    x = 753.06

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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.