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Finding the Fourth Proportional to 1,072.16, 1,608.44 and 379.23

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Solution

The fourth proportional to 1,072.16, 1,608.44 and 379.23 is: 568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.16 : 1,608.44 = 379.23 : x
  2. Step 2: Convert to fraction form
    1,072.16/1,608.44 = 379.23/x
  3. Step 3: Cross multiply
    1,072.16x = 1,608.44 × 379.23
  4. Step 4: Simplify right side
    1,072.16x = 609,969.82
  5. Step 5: Solve for x
    x = 609,969.82/1,072.16
  6. Step 6: Final answer
    x = 568.91

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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.