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Finding the Fourth Proportional to 371.29, 511.82 and 318.58

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Solution

The fourth proportional to 371.29, 511.82 and 318.58 is: 439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.29 : 511.82 = 318.58 : x
  2. Step 2: Convert to fraction form
    371.29/511.82 = 318.58/x
  3. Step 3: Cross multiply
    371.29x = 511.82 × 318.58
  4. Step 4: Simplify right side
    371.29x = 163,053.85
  5. Step 5: Solve for x
    x = 163,053.85/371.29
  6. Step 6: Final answer
    x = 439.16

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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.