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Finding the Fourth Proportional to 878,469.20, 1,317,703.80 and 873,220.40

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Solution

The fourth proportional to 878,469.20, 1,317,703.80 and 873,220.40 is: 1,309,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,469.20 : 1,317,703.80 = 873,220.40 : x
  2. Step 2: Convert to fraction form
    878,469.20/1,317,703.80 = 873,220.40/x
  3. Step 3: Cross multiply
    878,469.20x = 1,317,703.80 × 873,220.40
  4. Step 4: Simplify right side
    878,469.20x = 1,150,645,839,317.52
  5. Step 5: Solve for x
    x = 1,150,645,839,317.52/878,469.20
  6. Step 6: Final answer
    x = 1,309,830.60

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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.