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Finding the Fourth Proportional to 1,994.49, 2,991.78 and 954.60

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Solution

The fourth proportional to 1,994.49, 2,991.78 and 954.60 is: 1,431.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.49 : 2,991.78 = 954.60 : x
  2. Step 2: Convert to fraction form
    1,994.49/2,991.78 = 954.60/x
  3. Step 3: Cross multiply
    1,994.49x = 2,991.78 × 954.60
  4. Step 4: Simplify right side
    1,994.49x = 2,855,953.19
  5. Step 5: Solve for x
    x = 2,855,953.19/1,994.49
  6. Step 6: Final answer
    x = 1,431.92

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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.