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Finding the Fourth Proportional to 485,620.80, 728,085.60 and 185,985.60

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Solution

The fourth proportional to 485,620.80, 728,085.60 and 185,985.60 is: 278,846.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,620.80 : 728,085.60 = 185,985.60 : x
  2. Step 2: Convert to fraction form
    485,620.80/728,085.60 = 185,985.60/x
  3. Step 3: Cross multiply
    485,620.80x = 728,085.60 × 185,985.60
  4. Step 4: Simplify right side
    485,620.80x = 135,413,437,167.36
  5. Step 5: Solve for x
    x = 135,413,437,167.36/485,620.80
  6. Step 6: Final answer
    x = 278,846.04

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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.