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Finding the Fourth Proportional to 449,081.31, 618,679.49 and 312,868.87

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Solution

The fourth proportional to 449,081.31, 618,679.49 and 312,868.87 is: 431,025.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,081.31 : 618,679.49 = 312,868.87 : x
  2. Step 2: Convert to fraction form
    449,081.31/618,679.49 = 312,868.87/x
  3. Step 3: Cross multiply
    449,081.31x = 618,679.49 × 312,868.87
  4. Step 4: Simplify right side
    449,081.31x = 193,565,553,710.65
  5. Step 5: Solve for x
    x = 193,565,553,710.65/449,081.31
  6. Step 6: Final answer
    x = 431,025.63

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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.