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Finding the Fourth Proportional to 333,708.42, 500,558.46 and 80,991

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Solution

The fourth proportional to 333,708.42, 500,558.46 and 80,991 is: 121,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,708.42 : 500,558.46 = 80,991 : x
  2. Step 2: Convert to fraction form
    333,708.42/500,558.46 = 80,991/x
  3. Step 3: Cross multiply
    333,708.42x = 500,558.46 × 80,991
  4. Step 4: Simplify right side
    333,708.42x = 40,540,730,233.86
  5. Step 5: Solve for x
    x = 40,540,730,233.86/333,708.42
  6. Step 6: Final answer
    x = 121,485.49

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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.