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Finding the Fourth Proportional to 311,941.20, 467,911.80 and 238,213.20

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Solution

The fourth proportional to 311,941.20, 467,911.80 and 238,213.20 is: 357,319.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,941.20 : 467,911.80 = 238,213.20 : x
  2. Step 2: Convert to fraction form
    311,941.20/467,911.80 = 238,213.20/x
  3. Step 3: Cross multiply
    311,941.20x = 467,911.80 × 238,213.20
  4. Step 4: Simplify right side
    311,941.20x = 111,462,767,195.76
  5. Step 5: Solve for x
    x = 111,462,767,195.76/311,941.20
  6. Step 6: Final answer
    x = 357,319.80

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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.