Home / 1,290,278,803.20-1,935,670,147.20-513,792,326.40

Finding the Fourth Proportional to 1,290,278,803.20, 1,935,670,147.20 and 513,792,326.40

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Solution

The fourth proportional to 1,290,278,803.20, 1,935,670,147.20 and 513,792,326.40 is: 770,788,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,278,803.20 : 1,935,670,147.20 = 513,792,326.40 : x
  2. Step 2: Convert to fraction form
    1,290,278,803.20/1,935,670,147.20 = 513,792,326.40/x
  3. Step 3: Cross multiply
    1,290,278,803.20x = 1,935,670,147.20 × 513,792,326.40
  4. Step 4: Simplify right side
    1,290,278,803.20x = 994,532,468,072,918,400
  5. Step 5: Solve for x
    x = 994,532,468,072,918,400/1,290,278,803.20
  6. Step 6: Final answer
    x = 770,788,813.71

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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.