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Finding the Fourth Proportional to 1,486.51, 2,229.78 and 664.83

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Solution

The fourth proportional to 1,486.51, 2,229.78 and 664.83 is: 997.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.51 : 2,229.78 = 664.83 : x
  2. Step 2: Convert to fraction form
    1,486.51/2,229.78 = 664.83/x
  3. Step 3: Cross multiply
    1,486.51x = 2,229.78 × 664.83
  4. Step 4: Simplify right side
    1,486.51x = 1,482,413.49
  5. Step 5: Solve for x
    x = 1,482,413.49/1,486.51
  6. Step 6: Final answer
    x = 997.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.