Home / 442,918.80-664,378.20-309,949.20

Finding the Fourth Proportional to 442,918.80, 664,378.20 and 309,949.20

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Solution

The fourth proportional to 442,918.80, 664,378.20 and 309,949.20 is: 464,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,918.80 : 664,378.20 = 309,949.20 : x
  2. Step 2: Convert to fraction form
    442,918.80/664,378.20 = 309,949.20/x
  3. Step 3: Cross multiply
    442,918.80x = 664,378.20 × 309,949.20
  4. Step 4: Simplify right side
    442,918.80x = 205,923,491,587.44
  5. Step 5: Solve for x
    x = 205,923,491,587.44/442,918.80
  6. Step 6: Final answer
    x = 464,923.80

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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.