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Finding the Fourth Proportional to 809.94, 1,214.39 and 444.63

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Solution

The fourth proportional to 809.94, 1,214.39 and 444.63 is: 666.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.94 : 1,214.39 = 444.63 : x
  2. Step 2: Convert to fraction form
    809.94/1,214.39 = 444.63/x
  3. Step 3: Cross multiply
    809.94x = 1,214.39 × 444.63
  4. Step 4: Simplify right side
    809.94x = 539,959.89
  5. Step 5: Solve for x
    x = 539,959.89/809.94
  6. Step 6: Final answer
    x = 666.66

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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.