Home / 678,621,280.80-1,018,230,519.60-314,928,429.60

Finding the Fourth Proportional to 678,621,280.80, 1,018,230,519.60 and 314,928,429.60

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Solution

The fourth proportional to 678,621,280.80, 1,018,230,519.60 and 314,928,429.60 is: 472,531,215.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,621,280.80 : 1,018,230,519.60 = 314,928,429.60 : x
  2. Step 2: Convert to fraction form
    678,621,280.80/1,018,230,519.60 = 314,928,429.60/x
  3. Step 3: Cross multiply
    678,621,280.80x = 1,018,230,519.60 × 314,928,429.60
  4. Step 4: Simplify right side
    678,621,280.80x = 320,669,738,508,420,032
  5. Step 5: Solve for x
    x = 320,669,738,508,420,032/678,621,280.80
  6. Step 6: Final answer
    x = 472,531,215.25

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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.