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Finding the Fourth Proportional to 262.50, 393.45 and 147

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Solution

The fourth proportional to 262.50, 393.45 and 147 is: 220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.50 : 393.45 = 147 : x
  2. Step 2: Convert to fraction form
    262.50/393.45 = 147/x
  3. Step 3: Cross multiply
    262.50x = 393.45 × 147
  4. Step 4: Simplify right side
    262.50x = 57,837.15
  5. Step 5: Solve for x
    x = 57,837.15/262.50
  6. Step 6: Final answer
    x = 220.33

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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.