Home / 678,975.60-1,018,930.47-279,616.32

Finding the Fourth Proportional to 678,975.60, 1,018,930.47 and 279,616.32

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Solution

The fourth proportional to 678,975.60, 1,018,930.47 and 279,616.32 is: 419,616.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,975.60 : 1,018,930.47 = 279,616.32 : x
  2. Step 2: Convert to fraction form
    678,975.60/1,018,930.47 = 279,616.32/x
  3. Step 3: Cross multiply
    678,975.60x = 1,018,930.47 × 279,616.32
  4. Step 4: Simplify right side
    678,975.60x = 284,909,588,357.27
  5. Step 5: Solve for x
    x = 284,909,588,357.27/678,975.60
  6. Step 6: Final answer
    x = 419,616.83

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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.