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Finding the Fourth Proportional to 351.79, 527.29 and 146.31

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Solution

The fourth proportional to 351.79, 527.29 and 146.31 is: 219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.79 : 527.29 = 146.31 : x
  2. Step 2: Convert to fraction form
    351.79/527.29 = 146.31/x
  3. Step 3: Cross multiply
    351.79x = 527.29 × 146.31
  4. Step 4: Simplify right side
    351.79x = 77,147.80
  5. Step 5: Solve for x
    x = 77,147.80/351.79
  6. Step 6: Final answer
    x = 219.30

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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.