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Finding the Fourth Proportional to 485,998.40, 728,997.60 and 131,048.30

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Solution

The fourth proportional to 485,998.40, 728,997.60 and 131,048.30 is: 196,572.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,998.40 : 728,997.60 = 131,048.30 : x
  2. Step 2: Convert to fraction form
    485,998.40/728,997.60 = 131,048.30/x
  3. Step 3: Cross multiply
    485,998.40x = 728,997.60 × 131,048.30
  4. Step 4: Simplify right side
    485,998.40x = 95,533,896,184.08
  5. Step 5: Solve for x
    x = 95,533,896,184.08/485,998.40
  6. Step 6: Final answer
    x = 196,572.45

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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.