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Finding the Fourth Proportional to 485,515,898.40, 728,273,847.60 and 485,515,898.40

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Solution

The fourth proportional to 485,515,898.40, 728,273,847.60 and 485,515,898.40 is: 728,273,847.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,515,898.40 : 728,273,847.60 = 485,515,898.40 : x
  2. Step 2: Convert to fraction form
    485,515,898.40/728,273,847.60 = 485,515,898.40/x
  3. Step 3: Cross multiply
    485,515,898.40x = 728,273,847.60 × 485,515,898.40
  4. Step 4: Simplify right side
    485,515,898.40x = 353,588,531,398,738,688
  5. Step 5: Solve for x
    x = 353,588,531,398,738,688/485,515,898.40
  6. Step 6: Final answer
    x = 728,273,847.60

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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.