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Finding the Fourth Proportional to 283.08, 424.27 and 128.79

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Solution

The fourth proportional to 283.08, 424.27 and 128.79 is: 193.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.08 : 424.27 = 128.79 : x
  2. Step 2: Convert to fraction form
    283.08/424.27 = 128.79/x
  3. Step 3: Cross multiply
    283.08x = 424.27 × 128.79
  4. Step 4: Simplify right side
    283.08x = 54,641.73
  5. Step 5: Solve for x
    x = 54,641.73/283.08
  6. Step 6: Final answer
    x = 193.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.