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Finding the Fourth Proportional to 1,999,685,145.90, 2,792,671,728.90 and 1,999,685,145.90

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Solution

The fourth proportional to 1,999,685,145.90, 2,792,671,728.90 and 1,999,685,145.90 is: 2,792,671,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999,685,145.90 : 2,792,671,728.90 = 1,999,685,145.90 : x
  2. Step 2: Convert to fraction form
    1,999,685,145.90/2,792,671,728.90 = 1,999,685,145.90/x
  3. Step 3: Cross multiply
    1,999,685,145.90x = 2,792,671,728.90 × 1,999,685,145.90
  4. Step 4: Simplify right side
    1,999,685,145.90x = 5,584,464,173,656,202,240
  5. Step 5: Solve for x
    x = 5,584,464,173,656,202,240/1,999,685,145.90
  6. Step 6: Final answer
    x = 2,792,671,728.90

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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.