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Finding the Fourth Proportional to 628.49, 936.60 and 609.71

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Solution

The fourth proportional to 628.49, 936.60 and 609.71 is: 908.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.49 : 936.60 = 609.71 : x
  2. Step 2: Convert to fraction form
    628.49/936.60 = 609.71/x
  3. Step 3: Cross multiply
    628.49x = 936.60 × 609.71
  4. Step 4: Simplify right side
    628.49x = 571,054.39
  5. Step 5: Solve for x
    x = 571,054.39/628.49
  6. Step 6: Final answer
    x = 908.61

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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.