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Finding the Fourth Proportional to 485,398,363.20, 728,097,544.80 and 140,363,246.40

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Solution

The fourth proportional to 485,398,363.20, 728,097,544.80 and 140,363,246.40 is: 210,544,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,398,363.20 : 728,097,544.80 = 140,363,246.40 : x
  2. Step 2: Convert to fraction form
    485,398,363.20/728,097,544.80 = 140,363,246.40/x
  3. Step 3: Cross multiply
    485,398,363.20x = 728,097,544.80 × 140,363,246.40
  4. Step 4: Simplify right side
    485,398,363.20x = 102,198,135,083,997,440
  5. Step 5: Solve for x
    x = 102,198,135,083,997,440/485,398,363.20
  6. Step 6: Final answer
    x = 210,544,869.60

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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.