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Finding the Fourth Proportional to 2,753.88, 4,131.08 and 905.00

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Solution

The fourth proportional to 2,753.88, 4,131.08 and 905.00 is: 1,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.88 : 4,131.08 = 905.00 : x
  2. Step 2: Convert to fraction form
    2,753.88/4,131.08 = 905.00/x
  3. Step 3: Cross multiply
    2,753.88x = 4,131.08 × 905.00
  4. Step 4: Simplify right side
    2,753.88x = 3,738,602.22
  5. Step 5: Solve for x
    x = 3,738,602.22/2,753.88
  6. Step 6: Final answer
    x = 1,357.58

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Double scale
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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.