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Finding the Fourth Proportional to 386.28, 576.04 and 356.36

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Solution

The fourth proportional to 386.28, 576.04 and 356.36 is: 531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.28 : 576.04 = 356.36 : x
  2. Step 2: Convert to fraction form
    386.28/576.04 = 356.36/x
  3. Step 3: Cross multiply
    386.28x = 576.04 × 356.36
  4. Step 4: Simplify right side
    386.28x = 205,277.61
  5. Step 5: Solve for x
    x = 205,277.61/386.28
  6. Step 6: Final answer
    x = 531.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.