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Finding the Fourth Proportional to 279.87, 385.99 and 181.45

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Solution

The fourth proportional to 279.87, 385.99 and 181.45 is: 250.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.87 : 385.99 = 181.45 : x
  2. Step 2: Convert to fraction form
    279.87/385.99 = 181.45/x
  3. Step 3: Cross multiply
    279.87x = 385.99 × 181.45
  4. Step 4: Simplify right side
    279.87x = 70,037.91
  5. Step 5: Solve for x
    x = 70,037.91/279.87
  6. Step 6: Final answer
    x = 250.25

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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.