Home / 808,990,297.20-1,213,485,445.80-800,928,140.40

Finding the Fourth Proportional to 808,990,297.20, 1,213,485,445.80 and 800,928,140.40

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Solution

The fourth proportional to 808,990,297.20, 1,213,485,445.80 and 800,928,140.40 is: 1,201,392,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,990,297.20 : 1,213,485,445.80 = 800,928,140.40 : x
  2. Step 2: Convert to fraction form
    808,990,297.20/1,213,485,445.80 = 800,928,140.40/x
  3. Step 3: Cross multiply
    808,990,297.20x = 1,213,485,445.80 × 800,928,140.40
  4. Step 4: Simplify right side
    808,990,297.20x = 971,914,641,507,058,944
  5. Step 5: Solve for x
    x = 971,914,641,507,058,944/808,990,297.20
  6. Step 6: Final answer
    x = 1,201,392,210.60

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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.