Home / 780,518,708.49-1,170,846,880.78-220,285,528.21

Finding the Fourth Proportional to 780,518,708.49, 1,170,846,880.78 and 220,285,528.21

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Solution

The fourth proportional to 780,518,708.49, 1,170,846,880.78 and 220,285,528.21 is: 330,447,714.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,518,708.49 : 1,170,846,880.78 = 220,285,528.21 : x
  2. Step 2: Convert to fraction form
    780,518,708.49/1,170,846,880.78 = 220,285,528.21/x
  3. Step 3: Cross multiply
    780,518,708.49x = 1,170,846,880.78 × 220,285,528.21
  4. Step 4: Simplify right side
    780,518,708.49x = 257,920,623,585,653,216
  5. Step 5: Solve for x
    x = 257,920,623,585,653,216/780,518,708.49
  6. Step 6: Final answer
    x = 330,447,714.81

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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.