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Finding the Fourth Proportional to 485,616.30, 728,424.45 and 308,906.70

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Solution

The fourth proportional to 485,616.30, 728,424.45 and 308,906.70 is: 463,360.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,616.30 : 728,424.45 = 308,906.70 : x
  2. Step 2: Convert to fraction form
    485,616.30/728,424.45 = 308,906.70/x
  3. Step 3: Cross multiply
    485,616.30x = 728,424.45 × 308,906.70
  4. Step 4: Simplify right side
    485,616.30x = 225,015,193,048.82
  5. Step 5: Solve for x
    x = 225,015,193,048.82/485,616.30
  6. Step 6: Final answer
    x = 463,360.05

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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.