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Finding the Fourth Proportional to 1,994, 2,991.16 and 626

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Solution

The fourth proportional to 1,994, 2,991.16 and 626 is: 939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994 : 2,991.16 = 626 : x
  2. Step 2: Convert to fraction form
    1,994/2,991.16 = 626/x
  3. Step 3: Cross multiply
    1,994x = 2,991.16 × 626
  4. Step 4: Simplify right side
    1,994x = 1,872,466.16
  5. Step 5: Solve for x
    x = 1,872,466.16/1,994
  6. Step 6: Final answer
    x = 939.05

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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.