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Finding the Fourth Proportional to 485,218.28, 728,165.10 and 200,910.26

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Solution

The fourth proportional to 485,218.28, 728,165.10 and 200,910.26 is: 301,505.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,218.28 : 728,165.10 = 200,910.26 : x
  2. Step 2: Convert to fraction form
    485,218.28/728,165.10 = 200,910.26/x
  3. Step 3: Cross multiply
    485,218.28x = 728,165.10 × 200,910.26
  4. Step 4: Simplify right side
    485,218.28x = 146,295,839,563.93
  5. Step 5: Solve for x
    x = 146,295,839,563.93/485,218.28
  6. Step 6: Final answer
    x = 301,505.21

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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.