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Finding the Fourth Proportional to 992.86, 1,489.22 and 444.89

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Solution

The fourth proportional to 992.86, 1,489.22 and 444.89 is: 667.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.86 : 1,489.22 = 444.89 : x
  2. Step 2: Convert to fraction form
    992.86/1,489.22 = 444.89/x
  3. Step 3: Cross multiply
    992.86x = 1,489.22 × 444.89
  4. Step 4: Simplify right side
    992.86x = 662,539.09
  5. Step 5: Solve for x
    x = 662,539.09/992.86
  6. Step 6: Final answer
    x = 667.31

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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.