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Finding the Fourth Proportional to 994.86, 1,373.09 and 622.08

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Solution

The fourth proportional to 994.86, 1,373.09 and 622.08 is: 858.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.86 : 1,373.09 = 622.08 : x
  2. Step 2: Convert to fraction form
    994.86/1,373.09 = 622.08/x
  3. Step 3: Cross multiply
    994.86x = 1,373.09 × 622.08
  4. Step 4: Simplify right side
    994.86x = 854,171.83
  5. Step 5: Solve for x
    x = 854,171.83/994.86
  6. Step 6: Final answer
    x = 858.58

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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.