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Finding the Fourth Proportional to 438,596.70, 658,672.65 and 338,999.10

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Solution

The fourth proportional to 438,596.70, 658,672.65 and 338,999.10 is: 509,099.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,596.70 : 658,672.65 = 338,999.10 : x
  2. Step 2: Convert to fraction form
    438,596.70/658,672.65 = 338,999.10/x
  3. Step 3: Cross multiply
    438,596.70x = 658,672.65 × 338,999.10
  4. Step 4: Simplify right side
    438,596.70x = 223,289,435,544.62
  5. Step 5: Solve for x
    x = 223,289,435,544.62/438,596.70
  6. Step 6: Final answer
    x = 509,099.67

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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.