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Finding the Fourth Proportional to 485,998.80, 726,665.40 and 360,027.60

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Solution

The fourth proportional to 485,998.80, 726,665.40 and 360,027.60 is: 538,313.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,998.80 : 726,665.40 = 360,027.60 : x
  2. Step 2: Convert to fraction form
    485,998.80/726,665.40 = 360,027.60/x
  3. Step 3: Cross multiply
    485,998.80x = 726,665.40 × 360,027.60
  4. Step 4: Simplify right side
    485,998.80x = 261,619,599,965.04
  5. Step 5: Solve for x
    x = 261,619,599,965.04/485,998.80
  6. Step 6: Final answer
    x = 538,313.26

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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.