Home / 678,621,220.80-1,018,230,429.60-314,928,369.60

Finding the Fourth Proportional to 678,621,220.80, 1,018,230,429.60 and 314,928,369.60

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Solution

The fourth proportional to 678,621,220.80, 1,018,230,429.60 and 314,928,369.60 is: 472,531,125.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,621,220.80 : 1,018,230,429.60 = 314,928,369.60 : x
  2. Step 2: Convert to fraction form
    678,621,220.80/1,018,230,429.60 = 314,928,369.60/x
  3. Step 3: Cross multiply
    678,621,220.80x = 1,018,230,429.60 × 314,928,369.60
  4. Step 4: Simplify right side
    678,621,220.80x = 320,669,649,071,035,584
  5. Step 5: Solve for x
    x = 320,669,649,071,035,584/678,621,220.80
  6. Step 6: Final answer
    x = 472,531,125.23

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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.