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Finding the Fourth Proportional to 808,990,531.70, 1,213,485,797.55 and 800,928,374.90

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Solution

The fourth proportional to 808,990,531.70, 1,213,485,797.55 and 800,928,374.90 is: 1,201,392,562.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,990,531.70 : 1,213,485,797.55 = 800,928,374.90 : x
  2. Step 2: Convert to fraction form
    808,990,531.70/1,213,485,797.55 = 800,928,374.90/x
  3. Step 3: Cross multiply
    808,990,531.70x = 1,213,485,797.55 × 800,928,374.90
  4. Step 4: Simplify right side
    808,990,531.70x = 971,915,207,795,951,872
  5. Step 5: Solve for x
    x = 971,915,207,795,951,872/808,990,531.70
  6. Step 6: Final answer
    x = 1,201,392,562.35

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1.5x scale

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.