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Finding the Fourth Proportional to 660,067,280.10, 990,100,920.15 and 660,067,280.10

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Solution

The fourth proportional to 660,067,280.10, 990,100,920.15 and 660,067,280.10 is: 990,100,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,067,280.10 : 990,100,920.15 = 660,067,280.10 : x
  2. Step 2: Convert to fraction form
    660,067,280.10/990,100,920.15 = 660,067,280.10/x
  3. Step 3: Cross multiply
    660,067,280.10x = 990,100,920.15 × 660,067,280.10
  4. Step 4: Simplify right side
    660,067,280.10x = 653,533,221,387,917,824
  5. Step 5: Solve for x
    x = 653,533,221,387,917,824/660,067,280.10
  6. Step 6: Final answer
    x = 990,100,920.15

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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.