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Finding the Fourth Proportional to 354.77, 532.22 and 172.15

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Solution

The fourth proportional to 354.77, 532.22 and 172.15 is: 258.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.77 : 532.22 = 172.15 : x
  2. Step 2: Convert to fraction form
    354.77/532.22 = 172.15/x
  3. Step 3: Cross multiply
    354.77x = 532.22 × 172.15
  4. Step 4: Simplify right side
    354.77x = 91,621.67
  5. Step 5: Solve for x
    x = 91,621.67/354.77
  6. Step 6: Final answer
    x = 258.26

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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.