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Finding the Fourth Proportional to 343,359.09, 515,027.70 and 90,631.80

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Solution

The fourth proportional to 343,359.09, 515,027.70 and 90,631.80 is: 135,944.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,359.09 : 515,027.70 = 90,631.80 : x
  2. Step 2: Convert to fraction form
    343,359.09/515,027.70 = 90,631.80/x
  3. Step 3: Cross multiply
    343,359.09x = 515,027.70 × 90,631.80
  4. Step 4: Simplify right side
    343,359.09x = 46,677,887,500.86
  5. Step 5: Solve for x
    x = 46,677,887,500.86/343,359.09
  6. Step 6: Final answer
    x = 135,944.81

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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.