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Finding the Fourth Proportional to 2,659,456, 3,989,184 and 664,912

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Solution

The fourth proportional to 2,659,456, 3,989,184 and 664,912 is: 997,368

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659,456 : 3,989,184 = 664,912 : x
  2. Step 2: Convert to fraction form
    2,659,456/3,989,184 = 664,912/x
  3. Step 3: Cross multiply
    2,659,456x = 3,989,184 × 664,912
  4. Step 4: Simplify right side
    2,659,456x = 2,652,456,311,808
  5. Step 5: Solve for x
    x = 2,652,456,311,808/2,659,456
  6. Step 6: Final answer
    x = 997,368

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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.