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Finding the Fourth Proportional to 1,072.14, 1,608.36 and 486.81

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Solution

The fourth proportional to 1,072.14, 1,608.36 and 486.81 is: 730.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.14 : 1,608.36 = 486.81 : x
  2. Step 2: Convert to fraction form
    1,072.14/1,608.36 = 486.81/x
  3. Step 3: Cross multiply
    1,072.14x = 1,608.36 × 486.81
  4. Step 4: Simplify right side
    1,072.14x = 782,963.91
  5. Step 5: Solve for x
    x = 782,963.91/1,072.14
  6. Step 6: Final answer
    x = 730.28

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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.