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Finding the Fourth Proportional to 665,380.20, 998,216.10 and 265,920.60

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Solution

The fourth proportional to 665,380.20, 998,216.10 and 265,920.60 is: 398,939.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,380.20 : 998,216.10 = 265,920.60 : x
  2. Step 2: Convert to fraction form
    665,380.20/998,216.10 = 265,920.60/x
  3. Step 3: Cross multiply
    665,380.20x = 998,216.10 × 265,920.60
  4. Step 4: Simplify right side
    665,380.20x = 265,446,224,241.66
  5. Step 5: Solve for x
    x = 265,446,224,241.66/665,380.20
  6. Step 6: Final answer
    x = 398,939.17

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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.