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Finding the Fourth Proportional to 209,286.40, 313,929.60 and 104,310.40

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Solution

The fourth proportional to 209,286.40, 313,929.60 and 104,310.40 is: 156,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,286.40 : 313,929.60 = 104,310.40 : x
  2. Step 2: Convert to fraction form
    209,286.40/313,929.60 = 104,310.40/x
  3. Step 3: Cross multiply
    209,286.40x = 313,929.60 × 104,310.40
  4. Step 4: Simplify right side
    209,286.40x = 32,746,122,147.84
  5. Step 5: Solve for x
    x = 32,746,122,147.84/209,286.40
  6. Step 6: Final answer
    x = 156,465.60

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1.5x scale

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.