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Finding the Fourth Proportional to 628.92, 938.07 and 609.72

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Solution

The fourth proportional to 628.92, 938.07 and 609.72 is: 909.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.92 : 938.07 = 609.72 : x
  2. Step 2: Convert to fraction form
    628.92/938.07 = 609.72/x
  3. Step 3: Cross multiply
    628.92x = 938.07 × 609.72
  4. Step 4: Simplify right side
    628.92x = 571,960.04
  5. Step 5: Solve for x
    x = 571,960.04/628.92
  6. Step 6: Final answer
    x = 909.43

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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.