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Finding the Fourth Proportional to 871,891.60, 1,308,672.60 and 451,469.20

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Solution

The fourth proportional to 871,891.60, 1,308,672.60 and 451,469.20 is: 677,636.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,891.60 : 1,308,672.60 = 451,469.20 : x
  2. Step 2: Convert to fraction form
    871,891.60/1,308,672.60 = 451,469.20/x
  3. Step 3: Cross multiply
    871,891.60x = 1,308,672.60 × 451,469.20
  4. Step 4: Simplify right side
    871,891.60x = 590,825,371,783.92
  5. Step 5: Solve for x
    x = 590,825,371,783.92/871,891.60
  6. Step 6: Final answer
    x = 677,636.27

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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.