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Finding the Fourth Proportional to 660.96, 984.96 and 628.56

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Solution

The fourth proportional to 660.96, 984.96 and 628.56 is: 936.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.96 : 984.96 = 628.56 : x
  2. Step 2: Convert to fraction form
    660.96/984.96 = 628.56/x
  3. Step 3: Cross multiply
    660.96x = 984.96 × 628.56
  4. Step 4: Simplify right side
    660.96x = 619,106.46
  5. Step 5: Solve for x
    x = 619,106.46/660.96
  6. Step 6: Final answer
    x = 936.68

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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.