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Finding the Fourth Proportional to 289,762.38, 434,638.95 and 79,400.32

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Solution

The fourth proportional to 289,762.38, 434,638.95 and 79,400.32 is: 119,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,762.38 : 434,638.95 = 79,400.32 : x
  2. Step 2: Convert to fraction form
    289,762.38/434,638.95 = 79,400.32/x
  3. Step 3: Cross multiply
    289,762.38x = 434,638.95 × 79,400.32
  4. Step 4: Simplify right side
    289,762.38x = 34,510,469,144.27
  5. Step 5: Solve for x
    x = 34,510,469,144.27/289,762.38
  6. Step 6: Final answer
    x = 119,099.21

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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.