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Finding the Fourth Proportional to 290,677.92, 436,025.08 and 80,315.88

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Solution

The fourth proportional to 290,677.92, 436,025.08 and 80,315.88 is: 120,476.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,677.92 : 436,025.08 = 80,315.88 : x
  2. Step 2: Convert to fraction form
    290,677.92/436,025.08 = 80,315.88/x
  3. Step 3: Cross multiply
    290,677.92x = 436,025.08 × 80,315.88
  4. Step 4: Simplify right side
    290,677.92x = 35,019,738,002.27
  5. Step 5: Solve for x
    x = 35,019,738,002.27/290,677.92
  6. Step 6: Final answer
    x = 120,476.09

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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.