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Finding the Fourth Proportional to 371.36, 512.40 and 357.92

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Solution

The fourth proportional to 371.36, 512.40 and 357.92 is: 493.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.36 : 512.40 = 357.92 : x
  2. Step 2: Convert to fraction form
    371.36/512.40 = 357.92/x
  3. Step 3: Cross multiply
    371.36x = 512.40 × 357.92
  4. Step 4: Simplify right side
    371.36x = 183,398.21
  5. Step 5: Solve for x
    x = 183,398.21/371.36
  6. Step 6: Final answer
    x = 493.86

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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.