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Finding the Fourth Proportional to 283.77, 391.30 and 178.74

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Solution

The fourth proportional to 283.77, 391.30 and 178.74 is: 246.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.77 : 391.30 = 178.74 : x
  2. Step 2: Convert to fraction form
    283.77/391.30 = 178.74/x
  3. Step 3: Cross multiply
    283.77x = 391.30 × 178.74
  4. Step 4: Simplify right side
    283.77x = 69,939.41
  5. Step 5: Solve for x
    x = 69,939.41/283.77
  6. Step 6: Final answer
    x = 246.46

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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.