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Finding the Fourth Proportional to 208.80, 285.48 and 203.04

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Solution

The fourth proportional to 208.80, 285.48 and 203.04 is: 277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.80 : 285.48 = 203.04 : x
  2. Step 2: Convert to fraction form
    208.80/285.48 = 203.04/x
  3. Step 3: Cross multiply
    208.80x = 285.48 × 203.04
  4. Step 4: Simplify right side
    208.80x = 57,963.86
  5. Step 5: Solve for x
    x = 57,963.86/208.80
  6. Step 6: Final answer
    x = 277.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.