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Finding the Fourth Proportional to 354.79, 532.38 and 172.22

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Solution

The fourth proportional to 354.79, 532.38 and 172.22 is: 258.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.79 : 532.38 = 172.22 : x
  2. Step 2: Convert to fraction form
    354.79/532.38 = 172.22/x
  3. Step 3: Cross multiply
    354.79x = 532.38 × 172.22
  4. Step 4: Simplify right side
    354.79x = 91,686.48
  5. Step 5: Solve for x
    x = 91,686.48/354.79
  6. Step 6: Final answer
    x = 258.43

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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.