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Finding the Fourth Proportional to 371.19, 511.20 and 318.35

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Solution

The fourth proportional to 371.19, 511.20 and 318.35 is: 438.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.19 : 511.20 = 318.35 : x
  2. Step 2: Convert to fraction form
    371.19/511.20 = 318.35/x
  3. Step 3: Cross multiply
    371.19x = 511.20 × 318.35
  4. Step 4: Simplify right side
    371.19x = 162,737.96
  5. Step 5: Solve for x
    x = 162,737.96/371.19
  6. Step 6: Final answer
    x = 438.42

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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.