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Finding the Fourth Proportional to 280.08, 386.52 and 192.96

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Solution

The fourth proportional to 280.08, 386.52 and 192.96 is: 266.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.08 : 386.52 = 192.96 : x
  2. Step 2: Convert to fraction form
    280.08/386.52 = 192.96/x
  3. Step 3: Cross multiply
    280.08x = 386.52 × 192.96
  4. Step 4: Simplify right side
    280.08x = 74,582.90
  5. Step 5: Solve for x
    x = 74,582.90/280.08
  6. Step 6: Final answer
    x = 266.29

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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.