Home / 2,971.62-4,102.72-1,909.88

Finding the Fourth Proportional to 2,971.62, 4,102.72 and 1,909.88

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Solution

The fourth proportional to 2,971.62, 4,102.72 and 1,909.88 is: 2,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.62 : 4,102.72 = 1,909.88 : x
  2. Step 2: Convert to fraction form
    2,971.62/4,102.72 = 1,909.88/x
  3. Step 3: Cross multiply
    2,971.62x = 4,102.72 × 1,909.88
  4. Step 4: Simplify right side
    2,971.62x = 7,835,692.97
  5. Step 5: Solve for x
    x = 7,835,692.97/2,971.62
  6. Step 6: Final answer
    x = 2,636.84

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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.