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Finding the Fourth Proportional to 809.60, 1,213.48 and 444.56

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Solution

The fourth proportional to 809.60, 1,213.48 and 444.56 is: 666.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.60 : 1,213.48 = 444.56 : x
  2. Step 2: Convert to fraction form
    809.60/1,213.48 = 444.56/x
  3. Step 3: Cross multiply
    809.60x = 1,213.48 × 444.56
  4. Step 4: Simplify right side
    809.60x = 539,464.67
  5. Step 5: Solve for x
    x = 539,464.67/809.60
  6. Step 6: Final answer
    x = 666.33

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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.