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Finding the Fourth Proportional to 808,733,980.20, 1,213,100,970.30 and 792,609,666.60

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Solution

The fourth proportional to 808,733,980.20, 1,213,100,970.30 and 792,609,666.60 is: 1,188,914,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,733,980.20 : 1,213,100,970.30 = 792,609,666.60 : x
  2. Step 2: Convert to fraction form
    808,733,980.20/1,213,100,970.30 = 792,609,666.60/x
  3. Step 3: Cross multiply
    808,733,980.20x = 1,213,100,970.30 × 792,609,666.60
  4. Step 4: Simplify right side
    808,733,980.20x = 961,515,555,621,619,456
  5. Step 5: Solve for x
    x = 961,515,555,621,619,456/808,733,980.20
  6. Step 6: Final answer
    x = 1,188,914,499.90

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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.