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Finding the Fourth Proportional to 283.74, 391.68 and 185.64

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Solution

The fourth proportional to 283.74, 391.68 and 185.64 is: 256.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.74 : 391.68 = 185.64 : x
  2. Step 2: Convert to fraction form
    283.74/391.68 = 185.64/x
  3. Step 3: Cross multiply
    283.74x = 391.68 × 185.64
  4. Step 4: Simplify right side
    283.74x = 72,711.48
  5. Step 5: Solve for x
    x = 72,711.48/283.74
  6. Step 6: Final answer
    x = 256.26

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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.