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Finding the Fourth Proportional to 1,978,229.53, 2,729,958.29 and 1,072,811.53

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Solution

The fourth proportional to 1,978,229.53, 2,729,958.29 and 1,072,811.53 is: 1,480,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,229.53 : 2,729,958.29 = 1,072,811.53 : x
  2. Step 2: Convert to fraction form
    1,978,229.53/2,729,958.29 = 1,072,811.53/x
  3. Step 3: Cross multiply
    1,978,229.53x = 2,729,958.29 × 1,072,811.53
  4. Step 4: Simplify right side
    1,978,229.53x = 2,928,730,729,931.08
  5. Step 5: Solve for x
    x = 2,928,730,729,931.08/1,978,229.53
  6. Step 6: Final answer
    x = 1,480,480.75

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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.