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Finding the Fourth Proportional to 660,406.57, 989,918.46 and 276,375.45

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Solution

The fourth proportional to 660,406.57, 989,918.46 and 276,375.45 is: 414,273.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,406.57 : 989,918.46 = 276,375.45 : x
  2. Step 2: Convert to fraction form
    660,406.57/989,918.46 = 276,375.45/x
  3. Step 3: Cross multiply
    660,406.57x = 989,918.46 × 276,375.45
  4. Step 4: Simplify right side
    660,406.57x = 273,589,163,558.00
  5. Step 5: Solve for x
    x = 273,589,163,558.00/660,406.57
  6. Step 6: Final answer
    x = 414,273.84

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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.