Home / 1,126,680,989.82-1,688,828,694.94-378,984,968.34

Finding the Fourth Proportional to 1,126,680,989.82, 1,688,828,694.94 and 378,984,968.34

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Solution

The fourth proportional to 1,126,680,989.82, 1,688,828,694.94 and 378,984,968.34 is: 568,076,230.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126,680,989.82 : 1,688,828,694.94 = 378,984,968.34 : x
  2. Step 2: Convert to fraction form
    1,126,680,989.82/1,688,828,694.94 = 378,984,968.34/x
  3. Step 3: Cross multiply
    1,126,680,989.82x = 1,688,828,694.94 × 378,984,968.34
  4. Step 4: Simplify right side
    1,126,680,989.82x = 640,040,689,483,519,360
  5. Step 5: Solve for x
    x = 640,040,689,483,519,360/1,126,680,989.82
  6. Step 6: Final answer
    x = 568,076,230.33

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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.