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Finding the Fourth Proportional to 303,695.40, 455,543.10 and 219,714.60

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Solution

The fourth proportional to 303,695.40, 455,543.10 and 219,714.60 is: 329,571.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,695.40 : 455,543.10 = 219,714.60 : x
  2. Step 2: Convert to fraction form
    303,695.40/455,543.10 = 219,714.60/x
  3. Step 3: Cross multiply
    303,695.40x = 455,543.10 × 219,714.60
  4. Step 4: Simplify right side
    303,695.40x = 100,089,469,999.26
  5. Step 5: Solve for x
    x = 100,089,469,999.26/303,695.40
  6. Step 6: Final answer
    x = 329,571.90

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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.