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Finding the Fourth Proportional to 2,796.75, 4,195.16 and 947.90

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Solution

The fourth proportional to 2,796.75, 4,195.16 and 947.90 is: 1,421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,796.75 : 4,195.16 = 947.90 : x
  2. Step 2: Convert to fraction form
    2,796.75/4,195.16 = 947.90/x
  3. Step 3: Cross multiply
    2,796.75x = 4,195.16 × 947.90
  4. Step 4: Simplify right side
    2,796.75x = 3,976,566.45
  5. Step 5: Solve for x
    x = 3,976,566.45/2,796.75
  6. Step 6: Final answer
    x = 1,421.85

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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.