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Finding the Fourth Proportional to 338,609.90, 467,329.26 and 209,589.78

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Solution

The fourth proportional to 338,609.90, 467,329.26 and 209,589.78 is: 289,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,609.90 : 467,329.26 = 209,589.78 : x
  2. Step 2: Convert to fraction form
    338,609.90/467,329.26 = 209,589.78/x
  3. Step 3: Cross multiply
    338,609.90x = 467,329.26 × 209,589.78
  4. Step 4: Simplify right side
    338,609.90x = 97,947,436,790.96
  5. Step 5: Solve for x
    x = 97,947,436,790.96/338,609.90
  6. Step 6: Final answer
    x = 289,263.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.