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Finding the Fourth Proportional to 343,406.80, 515,110.20 and 324,053.20

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Solution

The fourth proportional to 343,406.80, 515,110.20 and 324,053.20 is: 486,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,406.80 : 515,110.20 = 324,053.20 : x
  2. Step 2: Convert to fraction form
    343,406.80/515,110.20 = 324,053.20/x
  3. Step 3: Cross multiply
    343,406.80x = 515,110.20 × 324,053.20
  4. Step 4: Simplify right side
    343,406.80x = 166,923,108,662.64
  5. Step 5: Solve for x
    x = 166,923,108,662.64/343,406.80
  6. Step 6: Final answer
    x = 486,079.80

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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.