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Finding the Fourth Proportional to 281.63, 388.68 and 202.93

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Solution

The fourth proportional to 281.63, 388.68 and 202.93 is: 280.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.63 : 388.68 = 202.93 : x
  2. Step 2: Convert to fraction form
    281.63/388.68 = 202.93/x
  3. Step 3: Cross multiply
    281.63x = 388.68 × 202.93
  4. Step 4: Simplify right side
    281.63x = 78,874.83
  5. Step 5: Solve for x
    x = 78,874.83/281.63
  6. Step 6: Final answer
    x = 280.07

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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.