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Finding the Fourth Proportional to 290,835.30, 436,262.67 and 80,455.62

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Solution

The fourth proportional to 290,835.30, 436,262.67 and 80,455.62 is: 120,686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,835.30 : 436,262.67 = 80,455.62 : x
  2. Step 2: Convert to fraction form
    290,835.30/436,262.67 = 80,455.62/x
  3. Step 3: Cross multiply
    290,835.30x = 436,262.67 × 80,455.62
  4. Step 4: Simplify right side
    290,835.30x = 35,099,783,597.71
  5. Step 5: Solve for x
    x = 35,099,783,597.71/290,835.30
  6. Step 6: Final answer
    x = 120,686.12

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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.