Home / 678,974.60-1,018,928.97-279,615.32

Finding the Fourth Proportional to 678,974.60, 1,018,928.97 and 279,615.32

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Solution

The fourth proportional to 678,974.60, 1,018,928.97 and 279,615.32 is: 419,615.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,974.60 : 1,018,928.97 = 279,615.32 : x
  2. Step 2: Convert to fraction form
    678,974.60/1,018,928.97 = 279,615.32/x
  3. Step 3: Cross multiply
    678,974.60x = 1,018,928.97 × 279,615.32
  4. Step 4: Simplify right side
    678,974.60x = 284,908,144,909.18
  5. Step 5: Solve for x
    x = 284,908,144,909.18/678,974.60
  6. Step 6: Final answer
    x = 419,615.32

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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.