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Finding the Fourth Proportional to 393.53, 590.29 and 146.79

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Solution

The fourth proportional to 393.53, 590.29 and 146.79 is: 220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.53 : 590.29 = 146.79 : x
  2. Step 2: Convert to fraction form
    393.53/590.29 = 146.79/x
  3. Step 3: Cross multiply
    393.53x = 590.29 × 146.79
  4. Step 4: Simplify right side
    393.53x = 86,645.72
  5. Step 5: Solve for x
    x = 86,645.72/393.53
  6. Step 6: Final answer
    x = 220.18

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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.