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Finding the Fourth Proportional to 2,221.44, 3,066.08 and 1,290.08

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Solution

The fourth proportional to 2,221.44, 3,066.08 and 1,290.08 is: 1,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.44 : 3,066.08 = 1,290.08 : x
  2. Step 2: Convert to fraction form
    2,221.44/3,066.08 = 1,290.08/x
  3. Step 3: Cross multiply
    2,221.44x = 3,066.08 × 1,290.08
  4. Step 4: Simplify right side
    2,221.44x = 3,955,488.49
  5. Step 5: Solve for x
    x = 3,955,488.49/2,221.44
  6. Step 6: Final answer
    x = 1,780.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.