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Finding the Fourth Proportional to 809,690.90, 1,213,880.10 and 336,730.28

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Solution

The fourth proportional to 809,690.90, 1,213,880.10 and 336,730.28 is: 504,822.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,690.90 : 1,213,880.10 = 336,730.28 : x
  2. Step 2: Convert to fraction form
    809,690.90/1,213,880.10 = 336,730.28/x
  3. Step 3: Cross multiply
    809,690.90x = 1,213,880.10 × 336,730.28
  4. Step 4: Simplify right side
    809,690.90x = 408,750,185,959.43
  5. Step 5: Solve for x
    x = 408,750,185,959.43/809,690.90
  6. Step 6: Final answer
    x = 504,822.50

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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.