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Finding the Fourth Proportional to 289,790.44, 434,639.01 and 79,379.20

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Solution

The fourth proportional to 289,790.44, 434,639.01 and 79,379.20 is: 119,056.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,790.44 : 434,639.01 = 79,379.20 : x
  2. Step 2: Convert to fraction form
    289,790.44/434,639.01 = 79,379.20/x
  3. Step 3: Cross multiply
    289,790.44x = 434,639.01 × 79,379.20
  4. Step 4: Simplify right side
    289,790.44x = 34,501,296,902.59
  5. Step 5: Solve for x
    x = 34,501,296,902.59/289,790.44
  6. Step 6: Final answer
    x = 119,056.02

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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.