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Finding the Fourth Proportional to 1,994.22, 2,988.21 and 1,262.25

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Solution

The fourth proportional to 1,994.22, 2,988.21 and 1,262.25 is: 1,891.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.22 : 2,988.21 = 1,262.25 : x
  2. Step 2: Convert to fraction form
    1,994.22/2,988.21 = 1,262.25/x
  3. Step 3: Cross multiply
    1,994.22x = 2,988.21 × 1,262.25
  4. Step 4: Simplify right side
    1,994.22x = 3,771,865.71
  5. Step 5: Solve for x
    x = 3,771,865.71/1,994.22
  6. Step 6: Final answer
    x = 1,891.40

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1.5x scale

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.