Home / 280,290.39-420,507.57-80,626.41

Finding the Fourth Proportional to 280,290.39, 420,507.57 and 80,626.41

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Solution

The fourth proportional to 280,290.39, 420,507.57 and 80,626.41 is: 120,960.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,290.39 : 420,507.57 = 80,626.41 : x
  2. Step 2: Convert to fraction form
    280,290.39/420,507.57 = 80,626.41/x
  3. Step 3: Cross multiply
    280,290.39x = 420,507.57 × 80,626.41
  4. Step 4: Simplify right side
    280,290.39x = 33,904,015,746.92
  5. Step 5: Solve for x
    x = 33,904,015,746.92/280,290.39
  6. Step 6: Final answer
    x = 120,960.32

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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.