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Finding the Fourth Proportional to 2,893.70, 3,990.80 and 2,333.99

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Solution

The fourth proportional to 2,893.70, 3,990.80 and 2,333.99 is: 3,218.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,893.70 : 3,990.80 = 2,333.99 : x
  2. Step 2: Convert to fraction form
    2,893.70/3,990.80 = 2,333.99/x
  3. Step 3: Cross multiply
    2,893.70x = 3,990.80 × 2,333.99
  4. Step 4: Simplify right side
    2,893.70x = 9,314,475.62
  5. Step 5: Solve for x
    x = 9,314,475.62/2,893.70
  6. Step 6: Final answer
    x = 3,218.88

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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.