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Finding the Fourth Proportional to 371.37, 512.52 and 309.09

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Solution

The fourth proportional to 371.37, 512.52 and 309.09 is: 426.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.37 : 512.52 = 309.09 : x
  2. Step 2: Convert to fraction form
    371.37/512.52 = 309.09/x
  3. Step 3: Cross multiply
    371.37x = 512.52 × 309.09
  4. Step 4: Simplify right side
    371.37x = 158,412.24
  5. Step 5: Solve for x
    x = 158,412.24/371.37
  6. Step 6: Final answer
    x = 426.57

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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.