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Finding the Fourth Proportional to 485,724.20, 728,051.70 and 170,018.60

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Solution

The fourth proportional to 485,724.20, 728,051.70 and 170,018.60 is: 254,840.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,724.20 : 728,051.70 = 170,018.60 : x
  2. Step 2: Convert to fraction form
    485,724.20/728,051.70 = 170,018.60/x
  3. Step 3: Cross multiply
    485,724.20x = 728,051.70 × 170,018.60
  4. Step 4: Simplify right side
    485,724.20x = 123,782,330,761.62
  5. Step 5: Solve for x
    x = 123,782,330,761.62/485,724.20
  6. Step 6: Final answer
    x = 254,840.77

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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.