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Finding the Fourth Proportional to 485,740.80, 728,265.60 and 186,105.60

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Solution

The fourth proportional to 485,740.80, 728,265.60 and 186,105.60 is: 279,025.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,740.80 : 728,265.60 = 186,105.60 : x
  2. Step 2: Convert to fraction form
    485,740.80/728,265.60 = 186,105.60/x
  3. Step 3: Cross multiply
    485,740.80x = 728,265.60 × 186,105.60
  4. Step 4: Simplify right side
    485,740.80x = 135,534,306,447.36
  5. Step 5: Solve for x
    x = 135,534,306,447.36/485,740.80
  6. Step 6: Final answer
    x = 279,025.99

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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.