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Finding the Fourth Proportional to 809,730, 1,213,765.56 and 336,690

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Solution

The fourth proportional to 809,730, 1,213,765.56 and 336,690 is: 504,690.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,730 : 1,213,765.56 = 336,690 : x
  2. Step 2: Convert to fraction form
    809,730/1,213,765.56 = 336,690/x
  3. Step 3: Cross multiply
    809,730x = 1,213,765.56 × 336,690
  4. Step 4: Simplify right side
    809,730x = 408,662,726,396.40
  5. Step 5: Solve for x
    x = 408,662,726,396.40/809,730
  6. Step 6: Final answer
    x = 504,690.11

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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.