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Finding the Fourth Proportional to 283.06, 424.47 and 191.78

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Solution

The fourth proportional to 283.06, 424.47 and 191.78 is: 287.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.06 : 424.47 = 191.78 : x
  2. Step 2: Convert to fraction form
    283.06/424.47 = 191.78/x
  3. Step 3: Cross multiply
    283.06x = 424.47 × 191.78
  4. Step 4: Simplify right side
    283.06x = 81,404.86
  5. Step 5: Solve for x
    x = 81,404.86/283.06
  6. Step 6: Final answer
    x = 287.59

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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.