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Finding the Fourth Proportional to 245,823.30, 368,861.31 and 212,755.86

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Solution

The fourth proportional to 245,823.30, 368,861.31 and 212,755.86 is: 319,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,823.30 : 368,861.31 = 212,755.86 : x
  2. Step 2: Convert to fraction form
    245,823.30/368,861.31 = 212,755.86/x
  3. Step 3: Cross multiply
    245,823.30x = 368,861.31 × 212,755.86
  4. Step 4: Simplify right side
    245,823.30x = 78,477,405,229.78
  5. Step 5: Solve for x
    x = 78,477,405,229.78/245,823.30
  6. Step 6: Final answer
    x = 319,243.15

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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.