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Finding the Fourth Proportional to 485,627.09, 728,650.92 and 260,725.11

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Solution

The fourth proportional to 485,627.09, 728,650.92 and 260,725.11 is: 391,200.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,627.09 : 728,650.92 = 260,725.11 : x
  2. Step 2: Convert to fraction form
    485,627.09/728,650.92 = 260,725.11/x
  3. Step 3: Cross multiply
    485,627.09x = 728,650.92 × 260,725.11
  4. Step 4: Simplify right side
    485,627.09x = 189,977,591,268.60
  5. Step 5: Solve for x
    x = 189,977,591,268.60/485,627.09
  6. Step 6: Final answer
    x = 391,200.57

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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.