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Finding the Fourth Proportional to 397,879.54, 549,072.21 and 216,601.54

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Solution

The fourth proportional to 397,879.54, 549,072.21 and 216,601.54 is: 298,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,879.54 : 549,072.21 = 216,601.54 : x
  2. Step 2: Convert to fraction form
    397,879.54/549,072.21 = 216,601.54/x
  3. Step 3: Cross multiply
    397,879.54x = 549,072.21 × 216,601.54
  4. Step 4: Simplify right side
    397,879.54x = 118,929,886,257.20
  5. Step 5: Solve for x
    x = 118,929,886,257.20/397,879.54
  6. Step 6: Final answer
    x = 298,909.28

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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.