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Finding the Fourth Proportional to 343,015.20, 515,905.20 and 307,072.80

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Solution

The fourth proportional to 343,015.20, 515,905.20 and 307,072.80 is: 461,846.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,015.20 : 515,905.20 = 307,072.80 : x
  2. Step 2: Convert to fraction form
    343,015.20/515,905.20 = 307,072.80/x
  3. Step 3: Cross multiply
    343,015.20x = 515,905.20 × 307,072.80
  4. Step 4: Simplify right side
    343,015.20x = 158,420,454,298.56
  5. Step 5: Solve for x
    x = 158,420,454,298.56/343,015.20
  6. Step 6: Final answer
    x = 461,846.75

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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.