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Finding the Fourth Proportional to 1,327,884.88, 1,990,806.36 and 687,502

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Solution

The fourth proportional to 1,327,884.88, 1,990,806.36 and 687,502 is: 1,030,724.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,884.88 : 1,990,806.36 = 687,502 : x
  2. Step 2: Convert to fraction form
    1,327,884.88/1,990,806.36 = 687,502/x
  3. Step 3: Cross multiply
    1,327,884.88x = 1,990,806.36 × 687,502
  4. Step 4: Simplify right side
    1,327,884.88x = 1,368,683,354,112.72
  5. Step 5: Solve for x
    x = 1,368,683,354,112.72/1,327,884.88
  6. Step 6: Final answer
    x = 1,030,724.41

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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.