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Finding the Fourth Proportional to 1,203,664, 1,661,056.32 and 667,120

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Solution

The fourth proportional to 1,203,664, 1,661,056.32 and 667,120 is: 920,625.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203,664 : 1,661,056.32 = 667,120 : x
  2. Step 2: Convert to fraction form
    1,203,664/1,661,056.32 = 667,120/x
  3. Step 3: Cross multiply
    1,203,664x = 1,661,056.32 × 667,120
  4. Step 4: Simplify right side
    1,203,664x = 1,108,123,892,198.40
  5. Step 5: Solve for x
    x = 1,108,123,892,198.40/1,203,664
  6. Step 6: Final answer
    x = 920,625.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.