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Finding the Fourth Proportional to 203.17, 303.28 and 172.45

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Solution

The fourth proportional to 203.17, 303.28 and 172.45 is: 257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.17 : 303.28 = 172.45 : x
  2. Step 2: Convert to fraction form
    203.17/303.28 = 172.45/x
  3. Step 3: Cross multiply
    203.17x = 303.28 × 172.45
  4. Step 4: Simplify right side
    203.17x = 52,300.64
  5. Step 5: Solve for x
    x = 52,300.64/203.17
  6. Step 6: Final answer
    x = 257.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.