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Finding the Fourth Proportional to 45.17, 62.31 and 30.62

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Solution

The fourth proportional to 45.17, 62.31 and 30.62 is: 42.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.17 : 62.31 = 30.62 : x
  2. Step 2: Convert to fraction form
    45.17/62.31 = 30.62/x
  3. Step 3: Cross multiply
    45.17x = 62.31 × 30.62
  4. Step 4: Simplify right side
    45.17x = 1,908.09
  5. Step 5: Solve for x
    x = 1,908.09/45.17
  6. Step 6: Final answer
    x = 42.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.