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Finding the Fourth Proportional to 445,990.20, 668,078.10 and 276,991.80

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Solution

The fourth proportional to 445,990.20, 668,078.10 and 276,991.80 is: 414,924.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,990.20 : 668,078.10 = 276,991.80 : x
  2. Step 2: Convert to fraction form
    445,990.20/668,078.10 = 276,991.80/x
  3. Step 3: Cross multiply
    445,990.20x = 668,078.10 × 276,991.80
  4. Step 4: Simplify right side
    445,990.20x = 185,052,155,459.58
  5. Step 5: Solve for x
    x = 185,052,155,459.58/445,990.20
  6. Step 6: Final answer
    x = 414,924.26

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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.