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Finding the Fourth Proportional to 46.12, 63.66 and 30.57

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Solution

The fourth proportional to 46.12, 63.66 and 30.57 is: 42.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.12 : 63.66 = 30.57 : x
  2. Step 2: Convert to fraction form
    46.12/63.66 = 30.57/x
  3. Step 3: Cross multiply
    46.12x = 63.66 × 30.57
  4. Step 4: Simplify right side
    46.12x = 1,945.99
  5. Step 5: Solve for x
    x = 1,945.99/46.12
  6. Step 6: Final answer
    x = 42.20

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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.