Home / 828,995,069.60-1,244,288,866.80-420,512,458.40

Finding the Fourth Proportional to 828,995,069.60, 1,244,288,866.80 and 420,512,458.40

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Solution

The fourth proportional to 828,995,069.60, 1,244,288,866.80 and 420,512,458.40 is: 631,172,596.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,995,069.60 : 1,244,288,866.80 = 420,512,458.40 : x
  2. Step 2: Convert to fraction form
    828,995,069.60/1,244,288,866.80 = 420,512,458.40/x
  3. Step 3: Cross multiply
    828,995,069.60x = 1,244,288,866.80 × 420,512,458.40
  4. Step 4: Simplify right side
    828,995,069.60x = 523,238,970,337,818,112
  5. Step 5: Solve for x
    x = 523,238,970,337,818,112/828,995,069.60
  6. Step 6: Final answer
    x = 631,172,596.23

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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.