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Finding the Fourth Proportional to 212,990.86, 294,104.28 and 190,289.80

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Solution

The fourth proportional to 212,990.86, 294,104.28 and 190,289.80 is: 262,757.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,990.86 : 294,104.28 = 190,289.80 : x
  2. Step 2: Convert to fraction form
    212,990.86/294,104.28 = 190,289.80/x
  3. Step 3: Cross multiply
    212,990.86x = 294,104.28 × 190,289.80
  4. Step 4: Simplify right side
    212,990.86x = 55,965,044,620.34
  5. Step 5: Solve for x
    x = 55,965,044,620.34/212,990.86
  6. Step 6: Final answer
    x = 262,757.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.