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Finding the Fourth Proportional to 343,874.40, 515,811.60 and 203,560.80

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Solution

The fourth proportional to 343,874.40, 515,811.60 and 203,560.80 is: 305,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,874.40 : 515,811.60 = 203,560.80 : x
  2. Step 2: Convert to fraction form
    343,874.40/515,811.60 = 203,560.80/x
  3. Step 3: Cross multiply
    343,874.40x = 515,811.60 × 203,560.80
  4. Step 4: Simplify right side
    343,874.40x = 104,999,021,945.28
  5. Step 5: Solve for x
    x = 104,999,021,945.28/343,874.40
  6. Step 6: Final answer
    x = 305,341.20

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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.