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Finding the Fourth Proportional to 628.43, 938.04 and 554.54

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Solution

The fourth proportional to 628.43, 938.04 and 554.54 is: 827.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.43 : 938.04 = 554.54 : x
  2. Step 2: Convert to fraction form
    628.43/938.04 = 554.54/x
  3. Step 3: Cross multiply
    628.43x = 938.04 × 554.54
  4. Step 4: Simplify right side
    628.43x = 520,177.45
  5. Step 5: Solve for x
    x = 520,177.45/628.43
  6. Step 6: Final answer
    x = 827.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.