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Finding the Fourth Proportional to 485,733.30, 728,661.06 and 260,784.60

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Solution

The fourth proportional to 485,733.30, 728,661.06 and 260,784.60 is: 391,209.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,733.30 : 728,661.06 = 260,784.60 : x
  2. Step 2: Convert to fraction form
    485,733.30/728,661.06 = 260,784.60/x
  3. Step 3: Cross multiply
    485,733.30x = 728,661.06 × 260,784.60
  4. Step 4: Simplify right side
    485,733.30x = 190,023,583,067.68
  5. Step 5: Solve for x
    x = 190,023,583,067.68/485,733.30
  6. Step 6: Final answer
    x = 391,209.71

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1.5x scale

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.