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Finding the Fourth Proportional to 648.65, 965.37 and 626.78

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Solution

The fourth proportional to 648.65, 965.37 and 626.78 is: 932.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.65 : 965.37 = 626.78 : x
  2. Step 2: Convert to fraction form
    648.65/965.37 = 626.78/x
  3. Step 3: Cross multiply
    648.65x = 965.37 × 626.78
  4. Step 4: Simplify right side
    648.65x = 605,077.02
  5. Step 5: Solve for x
    x = 605,077.02/648.65
  6. Step 6: Final answer
    x = 932.82

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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.