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Finding the Fourth Proportional to 185.99, 280.10 and 157.30

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Solution

The fourth proportional to 185.99, 280.10 and 157.30 is: 236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.99 : 280.10 = 157.30 : x
  2. Step 2: Convert to fraction form
    185.99/280.10 = 157.30/x
  3. Step 3: Cross multiply
    185.99x = 280.10 × 157.30
  4. Step 4: Simplify right side
    185.99x = 44,059.42
  5. Step 5: Solve for x
    x = 44,059.42/185.99
  6. Step 6: Final answer
    x = 236.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.