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Finding the Fourth Proportional to 265,468,279.20, 398,202,418.80 and 220,118,647.20

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Solution

The fourth proportional to 265,468,279.20, 398,202,418.80 and 220,118,647.20 is: 330,177,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,468,279.20 : 398,202,418.80 = 220,118,647.20 : x
  2. Step 2: Convert to fraction form
    265,468,279.20/398,202,418.80 = 220,118,647.20/x
  3. Step 3: Cross multiply
    265,468,279.20x = 398,202,418.80 × 220,118,647.20
  4. Step 4: Simplify right side
    265,468,279.20x = 87,651,777,738,023,840
  5. Step 5: Solve for x
    x = 87,651,777,738,023,840/265,468,279.20
  6. Step 6: Final answer
    x = 330,177,970.80

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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.