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Finding the Fourth Proportional to 356.38, 533.98 and 279.02

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Solution

The fourth proportional to 356.38, 533.98 and 279.02 is: 418.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.38 : 533.98 = 279.02 : x
  2. Step 2: Convert to fraction form
    356.38/533.98 = 279.02/x
  3. Step 3: Cross multiply
    356.38x = 533.98 × 279.02
  4. Step 4: Simplify right side
    356.38x = 148,989.70
  5. Step 5: Solve for x
    x = 148,989.70/356.38
  6. Step 6: Final answer
    x = 418.07

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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.