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Finding the Fourth Proportional to 538.71, 807.90 and 192.12

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Solution

The fourth proportional to 538.71, 807.90 and 192.12 is: 288.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.71 : 807.90 = 192.12 : x
  2. Step 2: Convert to fraction form
    538.71/807.90 = 192.12/x
  3. Step 3: Cross multiply
    538.71x = 807.90 × 192.12
  4. Step 4: Simplify right side
    538.71x = 155,213.75
  5. Step 5: Solve for x
    x = 155,213.75/538.71
  6. Step 6: Final answer
    x = 288.12

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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.