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Finding the Fourth Proportional to 280.08, 386.30 and 181.87

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Solution

The fourth proportional to 280.08, 386.30 and 181.87 is: 250.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.08 : 386.30 = 181.87 : x
  2. Step 2: Convert to fraction form
    280.08/386.30 = 181.87/x
  3. Step 3: Cross multiply
    280.08x = 386.30 × 181.87
  4. Step 4: Simplify right side
    280.08x = 70,255.87
  5. Step 5: Solve for x
    x = 70,255.87/280.08
  6. Step 6: Final answer
    x = 250.84

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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.