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Finding the Fourth Proportional to 608.12, 910.56 and 486.80

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Solution

The fourth proportional to 608.12, 910.56 and 486.80 is: 728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.12 : 910.56 = 486.80 : x
  2. Step 2: Convert to fraction form
    608.12/910.56 = 486.80/x
  3. Step 3: Cross multiply
    608.12x = 910.56 × 486.80
  4. Step 4: Simplify right side
    608.12x = 443,260.61
  5. Step 5: Solve for x
    x = 443,260.61/608.12
  6. Step 6: Final answer
    x = 728.90

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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.