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Finding the Fourth Proportional to 550,357.20, 825,535.80 and 485,403.30

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Solution

The fourth proportional to 550,357.20, 825,535.80 and 485,403.30 is: 728,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,357.20 : 825,535.80 = 485,403.30 : x
  2. Step 2: Convert to fraction form
    550,357.20/825,535.80 = 485,403.30/x
  3. Step 3: Cross multiply
    550,357.20x = 825,535.80 × 485,403.30
  4. Step 4: Simplify right side
    550,357.20x = 400,717,801,588.14
  5. Step 5: Solve for x
    x = 400,717,801,588.14/550,357.20
  6. Step 6: Final answer
    x = 728,104.95

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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.