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Finding the Fourth Proportional to 605.12, 906.12 and 489.04

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Solution

The fourth proportional to 605.12, 906.12 and 489.04 is: 732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.12 : 906.12 = 489.04 : x
  2. Step 2: Convert to fraction form
    605.12/906.12 = 489.04/x
  3. Step 3: Cross multiply
    605.12x = 906.12 × 489.04
  4. Step 4: Simplify right side
    605.12x = 443,128.92
  5. Step 5: Solve for x
    x = 443,128.92/605.12
  6. Step 6: Final answer
    x = 732.30

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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.