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Finding the Fourth Proportional to 290,835.15, 436,262.44 and 80,455.47

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Solution

The fourth proportional to 290,835.15, 436,262.44 and 80,455.47 is: 120,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,835.15 : 436,262.44 = 80,455.47 : x
  2. Step 2: Convert to fraction form
    290,835.15/436,262.44 = 80,455.47/x
  3. Step 3: Cross multiply
    290,835.15x = 436,262.44 × 80,455.47
  4. Step 4: Simplify right side
    290,835.15x = 35,099,697,069.96
  5. Step 5: Solve for x
    x = 35,099,697,069.96/290,835.15
  6. Step 6: Final answer
    x = 120,685.89

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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.