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Finding the Fourth Proportional to 485,572,276.80, 728,358,415.20 and 434,553,940.80

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Solution

The fourth proportional to 485,572,276.80, 728,358,415.20 and 434,553,940.80 is: 651,830,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,572,276.80 : 728,358,415.20 = 434,553,940.80 : x
  2. Step 2: Convert to fraction form
    485,572,276.80/728,358,415.20 = 434,553,940.80/x
  3. Step 3: Cross multiply
    485,572,276.80x = 728,358,415.20 × 434,553,940.80
  4. Step 4: Simplify right side
    485,572,276.80x = 316,511,019,640,002,624
  5. Step 5: Solve for x
    x = 316,511,019,640,002,624/485,572,276.80
  6. Step 6: Final answer
    x = 651,830,911.20

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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.