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Finding the Fourth Proportional to 485,918,672.80, 728,941,945.20 and 179,426,077.60

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Solution

The fourth proportional to 485,918,672.80, 728,941,945.20 and 179,426,077.60 is: 269,162,724.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,918,672.80 : 728,941,945.20 = 179,426,077.60 : x
  2. Step 2: Convert to fraction form
    485,918,672.80/728,941,945.20 = 179,426,077.60/x
  3. Step 3: Cross multiply
    485,918,672.80x = 728,941,945.20 × 179,426,077.60
  4. Step 4: Simplify right side
    485,918,672.80x = 130,791,194,025,350,144
  5. Step 5: Solve for x
    x = 130,791,194,025,350,144/485,918,672.80
  6. Step 6: Final answer
    x = 269,162,724.85

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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.