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Finding the Fourth Proportional to 1,168,355.80, 1,640,121.80 and 1,168,355.80

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Solution

The fourth proportional to 1,168,355.80, 1,640,121.80 and 1,168,355.80 is: 1,640,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168,355.80 : 1,640,121.80 = 1,168,355.80 : x
  2. Step 2: Convert to fraction form
    1,168,355.80/1,640,121.80 = 1,168,355.80/x
  3. Step 3: Cross multiply
    1,168,355.80x = 1,640,121.80 × 1,168,355.80
  4. Step 4: Simplify right side
    1,168,355.80x = 1,916,245,817,736.44
  5. Step 5: Solve for x
    x = 1,916,245,817,736.44/1,168,355.80
  6. Step 6: Final answer
    x = 1,640,121.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.