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Finding the Fourth Proportional to 879,626.20, 1,317,689.70 and 816,640.60

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Solution

The fourth proportional to 879,626.20, 1,317,689.70 and 816,640.60 is: 1,223,336.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,626.20 : 1,317,689.70 = 816,640.60 : x
  2. Step 2: Convert to fraction form
    879,626.20/1,317,689.70 = 816,640.60/x
  3. Step 3: Cross multiply
    879,626.20x = 1,317,689.70 × 816,640.60
  4. Step 4: Simplify right side
    879,626.20x = 1,076,078,907,221.82
  5. Step 5: Solve for x
    x = 1,076,078,907,221.82/879,626.20
  6. Step 6: Final answer
    x = 1,223,336.58

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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.