Home / 839,807,999.20-1,259,711,998.80-513,290,648.80

Finding the Fourth Proportional to 839,807,999.20, 1,259,711,998.80 and 513,290,648.80

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Solution

The fourth proportional to 839,807,999.20, 1,259,711,998.80 and 513,290,648.80 is: 769,935,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,807,999.20 : 1,259,711,998.80 = 513,290,648.80 : x
  2. Step 2: Convert to fraction form
    839,807,999.20/1,259,711,998.80 = 513,290,648.80/x
  3. Step 3: Cross multiply
    839,807,999.20x = 1,259,711,998.80 × 513,290,648.80
  4. Step 4: Simplify right side
    839,807,999.20x = 646,598,389,165,196,800
  5. Step 5: Solve for x
    x = 646,598,389,165,196,800/839,807,999.20
  6. Step 6: Final answer
    x = 769,935,973.20

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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.