Home / 678,896.40-1,018,927.80-300,399.60

Finding the Fourth Proportional to 678,896.40, 1,018,927.80 and 300,399.60

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Solution

The fourth proportional to 678,896.40, 1,018,927.80 and 300,399.60 is: 450,857.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,896.40 : 1,018,927.80 = 300,399.60 : x
  2. Step 2: Convert to fraction form
    678,896.40/1,018,927.80 = 300,399.60/x
  3. Step 3: Cross multiply
    678,896.40x = 1,018,927.80 × 300,399.60
  4. Step 4: Simplify right side
    678,896.40x = 306,085,503,548.88
  5. Step 5: Solve for x
    x = 306,085,503,548.88/678,896.40
  6. Step 6: Final answer
    x = 450,857.46

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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.