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Finding the Fourth Proportional to 220,689,968.80, 331,034,953.20 and 196,456,259.20

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Solution

The fourth proportional to 220,689,968.80, 331,034,953.20 and 196,456,259.20 is: 294,684,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,689,968.80 : 331,034,953.20 = 196,456,259.20 : x
  2. Step 2: Convert to fraction form
    220,689,968.80/331,034,953.20 = 196,456,259.20/x
  3. Step 3: Cross multiply
    220,689,968.80x = 331,034,953.20 × 196,456,259.20
  4. Step 4: Simplify right side
    220,689,968.80x = 65,033,888,570,119,064
  5. Step 5: Solve for x
    x = 65,033,888,570,119,064/220,689,968.80
  6. Step 6: Final answer
    x = 294,684,388.80

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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.