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Finding the Fourth Proportional to 399,671.08, 599,933.39 and 172,079.41

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Solution

The fourth proportional to 399,671.08, 599,933.39 and 172,079.41 is: 258,302.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,671.08 : 599,933.39 = 172,079.41 : x
  2. Step 2: Convert to fraction form
    399,671.08/599,933.39 = 172,079.41/x
  3. Step 3: Cross multiply
    399,671.08x = 599,933.39 × 172,079.41
  4. Step 4: Simplify right side
    399,671.08x = 103,236,183,790.50
  5. Step 5: Solve for x
    x = 103,236,183,790.50/399,671.08
  6. Step 6: Final answer
    x = 258,302.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.