Home / 820,224,127.20-1,230,336,190.80-431,515,365.60

Finding the Fourth Proportional to 820,224,127.20, 1,230,336,190.80 and 431,515,365.60

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Solution

The fourth proportional to 820,224,127.20, 1,230,336,190.80 and 431,515,365.60 is: 647,273,048.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,224,127.20 : 1,230,336,190.80 = 431,515,365.60 : x
  2. Step 2: Convert to fraction form
    820,224,127.20/1,230,336,190.80 = 431,515,365.60/x
  3. Step 3: Cross multiply
    820,224,127.20x = 1,230,336,190.80 × 431,515,365.60
  4. Step 4: Simplify right side
    820,224,127.20x = 530,908,971,183,973,376
  5. Step 5: Solve for x
    x = 530,908,971,183,973,376/820,224,127.20
  6. Step 6: Final answer
    x = 647,273,048.40

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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.