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Finding the Fourth Proportional to 449,081.43, 618,679.67 and 312,869.00

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Solution

The fourth proportional to 449,081.43, 618,679.67 and 312,869.00 is: 431,025.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,081.43 : 618,679.67 = 312,869.00 : x
  2. Step 2: Convert to fraction form
    449,081.43/618,679.67 = 312,869.00/x
  3. Step 3: Cross multiply
    449,081.43x = 618,679.67 × 312,869.00
  4. Step 4: Simplify right side
    449,081.43x = 193,565,685,015.49
  5. Step 5: Solve for x
    x = 193,565,685,015.49/449,081.43
  6. Step 6: Final answer
    x = 431,025.81

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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.