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Finding the Fourth Proportional to 243,321.80, 364,824.30 and 218,438.60

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Solution

The fourth proportional to 243,321.80, 364,824.30 and 218,438.60 is: 327,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,321.80 : 364,824.30 = 218,438.60 : x
  2. Step 2: Convert to fraction form
    243,321.80/364,824.30 = 218,438.60/x
  3. Step 3: Cross multiply
    243,321.80x = 364,824.30 × 218,438.60
  4. Step 4: Simplify right side
    243,321.80x = 79,691,709,337.98
  5. Step 5: Solve for x
    x = 79,691,709,337.98/243,321.80
  6. Step 6: Final answer
    x = 327,515.70

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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.