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Finding the Fourth Proportional to 485,674.20, 728,511.30 and 275,722.20

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Solution

The fourth proportional to 485,674.20, 728,511.30 and 275,722.20 is: 413,583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,674.20 : 728,511.30 = 275,722.20 : x
  2. Step 2: Convert to fraction form
    485,674.20/728,511.30 = 275,722.20/x
  3. Step 3: Cross multiply
    485,674.20x = 728,511.30 × 275,722.20
  4. Step 4: Simplify right side
    485,674.20x = 200,866,738,360.86
  5. Step 5: Solve for x
    x = 200,866,738,360.86/485,674.20
  6. Step 6: Final answer
    x = 413,583.30

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Double scale
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Similar ratio
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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.