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Finding the Fourth Proportional to 356.20, 533.42 and 253.06

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Solution

The fourth proportional to 356.20, 533.42 and 253.06 is: 378.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.20 : 533.42 = 253.06 : x
  2. Step 2: Convert to fraction form
    356.20/533.42 = 253.06/x
  3. Step 3: Cross multiply
    356.20x = 533.42 × 253.06
  4. Step 4: Simplify right side
    356.20x = 134,985.62
  5. Step 5: Solve for x
    x = 134,985.62/356.20
  6. Step 6: Final answer
    x = 378.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.