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Finding the Fourth Proportional to 326,684.25, 449,424.59 and 312,687.45

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Solution

The fourth proportional to 326,684.25, 449,424.59 and 312,687.45 is: 430,168.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,684.25 : 449,424.59 = 312,687.45 : x
  2. Step 2: Convert to fraction form
    326,684.25/449,424.59 = 312,687.45/x
  3. Step 3: Cross multiply
    326,684.25x = 449,424.59 × 312,687.45
  4. Step 4: Simplify right side
    326,684.25x = 140,529,427,450.96
  5. Step 5: Solve for x
    x = 140,529,427,450.96/326,684.25
  6. Step 6: Final answer
    x = 430,168.97

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1.5x scale

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.