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Finding the Fourth Proportional to 845,379, 1,268,234.28 and 312,904.56

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Solution

The fourth proportional to 845,379, 1,268,234.28 and 312,904.56 is: 469,418.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,379 : 1,268,234.28 = 312,904.56 : x
  2. Step 2: Convert to fraction form
    845,379/1,268,234.28 = 312,904.56/x
  3. Step 3: Cross multiply
    845,379x = 1,268,234.28 × 312,904.56
  4. Step 4: Simplify right side
    845,379x = 396,836,289,360.32
  5. Step 5: Solve for x
    x = 396,836,289,360.32/845,379
  6. Step 6: Final answer
    x = 469,418.20

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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.