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Finding the Fourth Proportional to 290,651.40, 436,002.42 and 80,289.54

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Solution

The fourth proportional to 290,651.40, 436,002.42 and 80,289.54 is: 120,441.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,651.40 : 436,002.42 = 80,289.54 : x
  2. Step 2: Convert to fraction form
    290,651.40/436,002.42 = 80,289.54/x
  3. Step 3: Cross multiply
    290,651.40x = 436,002.42 × 80,289.54
  4. Step 4: Simplify right side
    290,651.40x = 35,006,433,740.69
  5. Step 5: Solve for x
    x = 35,006,433,740.69/290,651.40
  6. Step 6: Final answer
    x = 120,441.30

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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.