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Finding the Fourth Proportional to 1,469.76, 2,028.32 and 806.64

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Solution

The fourth proportional to 1,469.76, 2,028.32 and 806.64 is: 1,113.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.76 : 2,028.32 = 806.64 : x
  2. Step 2: Convert to fraction form
    1,469.76/2,028.32 = 806.64/x
  3. Step 3: Cross multiply
    1,469.76x = 2,028.32 × 806.64
  4. Step 4: Simplify right side
    1,469.76x = 1,636,124.04
  5. Step 5: Solve for x
    x = 1,636,124.04/1,469.76
  6. Step 6: Final answer
    x = 1,113.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.