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Finding the Fourth Proportional to 796.20, 1,098.70 and 446.80

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Solution

The fourth proportional to 796.20, 1,098.70 and 446.80 is: 616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.20 : 1,098.70 = 446.80 : x
  2. Step 2: Convert to fraction form
    796.20/1,098.70 = 446.80/x
  3. Step 3: Cross multiply
    796.20x = 1,098.70 × 446.80
  4. Step 4: Simplify right side
    796.20x = 490,899.16
  5. Step 5: Solve for x
    x = 490,899.16/796.20
  6. Step 6: Final answer
    x = 616.55

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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.