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Finding the Fourth Proportional to 878,946.17, 1,325,007.11 and 820,355.96

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Solution

The fourth proportional to 878,946.17, 1,325,007.11 and 820,355.96 is: 1,236,682.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,946.17 : 1,325,007.11 = 820,355.96 : x
  2. Step 2: Convert to fraction form
    878,946.17/1,325,007.11 = 820,355.96/x
  3. Step 3: Cross multiply
    878,946.17x = 1,325,007.11 × 820,355.96
  4. Step 4: Simplify right side
    878,946.17x = 1,086,977,469,004.06
  5. Step 5: Solve for x
    x = 1,086,977,469,004.06/878,946.17
  6. Step 6: Final answer
    x = 1,236,682.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.