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Finding the Fourth Proportional to 391.84, 587.62 and 186.24

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Solution

The fourth proportional to 391.84, 587.62 and 186.24 is: 279.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.84 : 587.62 = 186.24 : x
  2. Step 2: Convert to fraction form
    391.84/587.62 = 186.24/x
  3. Step 3: Cross multiply
    391.84x = 587.62 × 186.24
  4. Step 4: Simplify right side
    391.84x = 109,438.35
  5. Step 5: Solve for x
    x = 109,438.35/391.84
  6. Step 6: Final answer
    x = 279.29

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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.