Home / 678,642.40-1,018,379.60-279,474.40

Finding the Fourth Proportional to 678,642.40, 1,018,379.60 and 279,474.40

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Solution

The fourth proportional to 678,642.40, 1,018,379.60 and 279,474.40 is: 419,382.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,642.40 : 1,018,379.60 = 279,474.40 : x
  2. Step 2: Convert to fraction form
    678,642.40/1,018,379.60 = 279,474.40/x
  3. Step 3: Cross multiply
    678,642.40x = 1,018,379.60 × 279,474.40
  4. Step 4: Simplify right side
    678,642.40x = 284,611,027,682.24
  5. Step 5: Solve for x
    x = 284,611,027,682.24/678,642.40
  6. Step 6: Final answer
    x = 419,382.91

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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.