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Finding the Fourth Proportional to 663.06, 987.59 and 628.37

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Solution

The fourth proportional to 663.06, 987.59 and 628.37 is: 935.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.06 : 987.59 = 628.37 : x
  2. Step 2: Convert to fraction form
    663.06/987.59 = 628.37/x
  3. Step 3: Cross multiply
    663.06x = 987.59 × 628.37
  4. Step 4: Simplify right side
    663.06x = 620,571.93
  5. Step 5: Solve for x
    x = 620,571.93/663.06
  6. Step 6: Final answer
    x = 935.92

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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.