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Finding the Fourth Proportional to 538.20, 807.38 and 172.92

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Solution

The fourth proportional to 538.20, 807.38 and 172.92 is: 259.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.20 : 807.38 = 172.92 : x
  2. Step 2: Convert to fraction form
    538.20/807.38 = 172.92/x
  3. Step 3: Cross multiply
    538.20x = 807.38 × 172.92
  4. Step 4: Simplify right side
    538.20x = 139,612.15
  5. Step 5: Solve for x
    x = 139,612.15/538.20
  6. Step 6: Final answer
    x = 259.41

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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.