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Finding the Fourth Proportional to 691,991.44, 954,785.22 and 420,052.60

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Solution

The fourth proportional to 691,991.44, 954,785.22 and 420,052.60 is: 579,573.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,991.44 : 954,785.22 = 420,052.60 : x
  2. Step 2: Convert to fraction form
    691,991.44/954,785.22 = 420,052.60/x
  3. Step 3: Cross multiply
    691,991.44x = 954,785.22 × 420,052.60
  4. Step 4: Simplify right side
    691,991.44x = 401,060,014,102.57
  5. Step 5: Solve for x
    x = 401,060,014,102.57/691,991.44
  6. Step 6: Final answer
    x = 579,573.66

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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.