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Finding the Fourth Proportional to 1,994.14, 2,991.20 and 607.48

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Solution

The fourth proportional to 1,994.14, 2,991.20 and 607.48 is: 911.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.14 : 2,991.20 = 607.48 : x
  2. Step 2: Convert to fraction form
    1,994.14/2,991.20 = 607.48/x
  3. Step 3: Cross multiply
    1,994.14x = 2,991.20 × 607.48
  4. Step 4: Simplify right side
    1,994.14x = 1,817,079.22
  5. Step 5: Solve for x
    x = 1,817,079.22/1,994.14
  6. Step 6: Final answer
    x = 911.21

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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.