Home / 280,303.80-420,455.78-69,941.73

Finding the Fourth Proportional to 280,303.80, 420,455.78 and 69,941.73

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Solution

The fourth proportional to 280,303.80, 420,455.78 and 69,941.73 is: 104,912.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,303.80 : 420,455.78 = 69,941.73 : x
  2. Step 2: Convert to fraction form
    280,303.80/420,455.78 = 69,941.73/x
  3. Step 3: Cross multiply
    280,303.80x = 420,455.78 × 69,941.73
  4. Step 4: Simplify right side
    280,303.80x = 29,407,404,291.99
  5. Step 5: Solve for x
    x = 29,407,404,291.99/280,303.80
  6. Step 6: Final answer
    x = 104,912.61

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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.