Home / 687,778.75-949,145.85-381,874.85

Finding the Fourth Proportional to 687,778.75, 949,145.85 and 381,874.85

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Solution

The fourth proportional to 687,778.75, 949,145.85 and 381,874.85 is: 526,993.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,778.75 : 949,145.85 = 381,874.85 : x
  2. Step 2: Convert to fraction form
    687,778.75/949,145.85 = 381,874.85/x
  3. Step 3: Cross multiply
    687,778.75x = 949,145.85 × 381,874.85
  4. Step 4: Simplify right side
    687,778.75x = 362,454,933,249.39
  5. Step 5: Solve for x
    x = 362,454,933,249.39/687,778.75
  6. Step 6: Final answer
    x = 526,993.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.