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Finding the Fourth Proportional to 391.89, 587.61 and 148.26

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Solution

The fourth proportional to 391.89, 587.61 and 148.26 is: 222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.89 : 587.61 = 148.26 : x
  2. Step 2: Convert to fraction form
    391.89/587.61 = 148.26/x
  3. Step 3: Cross multiply
    391.89x = 587.61 × 148.26
  4. Step 4: Simplify right side
    391.89x = 87,119.06
  5. Step 5: Solve for x
    x = 87,119.06/391.89
  6. Step 6: Final answer
    x = 222.30

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