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Finding the Fourth Proportional to 326,695, 449,439.42 and 312,698.20

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Solution

The fourth proportional to 326,695, 449,439.42 and 312,698.20 is: 430,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,695 : 449,439.42 = 312,698.20 : x
  2. Step 2: Convert to fraction form
    326,695/449,439.42 = 312,698.20/x
  3. Step 3: Cross multiply
    326,695x = 449,439.42 × 312,698.20
  4. Step 4: Simplify right side
    326,695x = 140,538,897,643.04
  5. Step 5: Solve for x
    x = 140,538,897,643.04/326,695
  6. Step 6: Final answer
    x = 430,183.80

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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.