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Finding the Fourth Proportional to 202.68, 304.02 and 172.45

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Solution

The fourth proportional to 202.68, 304.02 and 172.45 is: 258.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.68 : 304.02 = 172.45 : x
  2. Step 2: Convert to fraction form
    202.68/304.02 = 172.45/x
  3. Step 3: Cross multiply
    202.68x = 304.02 × 172.45
  4. Step 4: Simplify right side
    202.68x = 52,428.25
  5. Step 5: Solve for x
    x = 52,428.25/202.68
  6. Step 6: Final answer
    x = 258.68

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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.