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Finding the Fourth Proportional to 393.54, 590.31 and 149.87

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Solution

The fourth proportional to 393.54, 590.31 and 149.87 is: 224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.54 : 590.31 = 149.87 : x
  2. Step 2: Convert to fraction form
    393.54/590.31 = 149.87/x
  3. Step 3: Cross multiply
    393.54x = 590.31 × 149.87
  4. Step 4: Simplify right side
    393.54x = 88,466.81
  5. Step 5: Solve for x
    x = 88,466.81/393.54
  6. Step 6: Final answer
    x = 224.80

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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.