Home / 678,610.40-1,018,331.60-279,442.40

Finding the Fourth Proportional to 678,610.40, 1,018,331.60 and 279,442.40

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Solution

The fourth proportional to 678,610.40, 1,018,331.60 and 279,442.40 is: 419,334.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,610.40 : 1,018,331.60 = 279,442.40 : x
  2. Step 2: Convert to fraction form
    678,610.40/1,018,331.60 = 279,442.40/x
  3. Step 3: Cross multiply
    678,610.40x = 1,018,331.60 × 279,442.40
  4. Step 4: Simplify right side
    678,610.40x = 284,565,026,299.84
  5. Step 5: Solve for x
    x = 284,565,026,299.84/678,610.40
  6. Step 6: Final answer
    x = 419,334.90

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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.