Home / 830,509,771.20-1,245,764,656.80-217,155,998.40

Finding the Fourth Proportional to 830,509,771.20, 1,245,764,656.80 and 217,155,998.40

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Solution

The fourth proportional to 830,509,771.20, 1,245,764,656.80 and 217,155,998.40 is: 325,733,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,509,771.20 : 1,245,764,656.80 = 217,155,998.40 : x
  2. Step 2: Convert to fraction form
    830,509,771.20/1,245,764,656.80 = 217,155,998.40/x
  3. Step 3: Cross multiply
    830,509,771.20x = 1,245,764,656.80 × 217,155,998.40
  4. Step 4: Simplify right side
    830,509,771.20x = 270,525,267,818,837,344
  5. Step 5: Solve for x
    x = 270,525,267,818,837,344/830,509,771.20
  6. Step 6: Final answer
    x = 325,733,997.60

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Double scale
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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.