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Finding the Fourth Proportional to 486.28, 729.42 and 414.28

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Solution

The fourth proportional to 486.28, 729.42 and 414.28 is: 621.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.28 : 729.42 = 414.28 : x
  2. Step 2: Convert to fraction form
    486.28/729.42 = 414.28/x
  3. Step 3: Cross multiply
    486.28x = 729.42 × 414.28
  4. Step 4: Simplify right side
    486.28x = 302,184.12
  5. Step 5: Solve for x
    x = 302,184.12/486.28
  6. Step 6: Final answer
    x = 621.42

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Similar ratio
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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.