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Finding the Fourth Proportional to 262.63, 393.38 and 171.06

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Solution

The fourth proportional to 262.63, 393.38 and 171.06 is: 256.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.63 : 393.38 = 171.06 : x
  2. Step 2: Convert to fraction form
    262.63/393.38 = 171.06/x
  3. Step 3: Cross multiply
    262.63x = 393.38 × 171.06
  4. Step 4: Simplify right side
    262.63x = 67,288.76
  5. Step 5: Solve for x
    x = 67,288.76/262.63
  6. Step 6: Final answer
    x = 256.21

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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.