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Finding the Fourth Proportional to 538.31, 807.62 and 153.56

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Solution

The fourth proportional to 538.31, 807.62 and 153.56 is: 230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.31 : 807.62 = 153.56 : x
  2. Step 2: Convert to fraction form
    538.31/807.62 = 153.56/x
  3. Step 3: Cross multiply
    538.31x = 807.62 × 153.56
  4. Step 4: Simplify right side
    538.31x = 124,019.38
  5. Step 5: Solve for x
    x = 124,019.38/538.31
  6. Step 6: Final answer
    x = 230.39

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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.