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Finding the Fourth Proportional to 356.28, 531.38 and 305.25

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Solution

The fourth proportional to 356.28, 531.38 and 305.25 is: 455.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.28 : 531.38 = 305.25 : x
  2. Step 2: Convert to fraction form
    356.28/531.38 = 305.25/x
  3. Step 3: Cross multiply
    356.28x = 531.38 × 305.25
  4. Step 4: Simplify right side
    356.28x = 162,202.22
  5. Step 5: Solve for x
    x = 162,202.22/356.28
  6. Step 6: Final answer
    x = 455.27

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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.