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Finding the Fourth Proportional to 289,790.08, 434,688.15 and 79,428.01

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Solution

The fourth proportional to 289,790.08, 434,688.15 and 79,428.01 is: 119,142.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,790.08 : 434,688.15 = 79,428.01 : x
  2. Step 2: Convert to fraction form
    289,790.08/434,688.15 = 79,428.01/x
  3. Step 3: Cross multiply
    289,790.08x = 434,688.15 × 79,428.01
  4. Step 4: Simplify right side
    289,790.08x = 34,526,414,725.08
  5. Step 5: Solve for x
    x = 34,526,414,725.08/289,790.08
  6. Step 6: Final answer
    x = 119,142.85

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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.