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Finding the Fourth Proportional to 485,876,138.10, 728,814,207.15 and 485,876,138.10

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Solution

The fourth proportional to 485,876,138.10, 728,814,207.15 and 485,876,138.10 is: 728,814,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,876,138.10 : 728,814,207.15 = 485,876,138.10 : x
  2. Step 2: Convert to fraction form
    485,876,138.10/728,814,207.15 = 485,876,138.10/x
  3. Step 3: Cross multiply
    485,876,138.10x = 728,814,207.15 × 485,876,138.10
  4. Step 4: Simplify right side
    485,876,138.10x = 354,113,432,362,455,424
  5. Step 5: Solve for x
    x = 354,113,432,362,455,424/485,876,138.10
  6. Step 6: Final answer
    x = 728,814,207.15

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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.