Home / 809,919.20-1,214,878.80-360,639.20

Finding the Fourth Proportional to 809,919.20, 1,214,878.80 and 360,639.20

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Solution

The fourth proportional to 809,919.20, 1,214,878.80 and 360,639.20 is: 540,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,919.20 : 1,214,878.80 = 360,639.20 : x
  2. Step 2: Convert to fraction form
    809,919.20/1,214,878.80 = 360,639.20/x
  3. Step 3: Cross multiply
    809,919.20x = 1,214,878.80 × 360,639.20
  4. Step 4: Simplify right side
    809,919.20x = 438,132,918,528.96
  5. Step 5: Solve for x
    x = 438,132,918,528.96/809,919.20
  6. Step 6: Final answer
    x = 540,958.80

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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.