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Finding the Fourth Proportional to 1,994.22, 2,991.48 and 607.47

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Solution

The fourth proportional to 1,994.22, 2,991.48 and 607.47 is: 911.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.22 : 2,991.48 = 607.47 : x
  2. Step 2: Convert to fraction form
    1,994.22/2,991.48 = 607.47/x
  3. Step 3: Cross multiply
    1,994.22x = 2,991.48 × 607.47
  4. Step 4: Simplify right side
    1,994.22x = 1,817,234.36
  5. Step 5: Solve for x
    x = 1,817,234.36/1,994.22
  6. Step 6: Final answer
    x = 911.25

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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.