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Finding the Fourth Proportional to 358.06, 494 and 202.78

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Solution

The fourth proportional to 358.06, 494 and 202.78 is: 279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.06 : 494 = 202.78 : x
  2. Step 2: Convert to fraction form
    358.06/494 = 202.78/x
  3. Step 3: Cross multiply
    358.06x = 494 × 202.78
  4. Step 4: Simplify right side
    358.06x = 100,173.32
  5. Step 5: Solve for x
    x = 100,173.32/358.06
  6. Step 6: Final answer
    x = 279.77

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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.