Home / 280,252.22-420,375.56-128,406.24

Finding the Fourth Proportional to 280,252.22, 420,375.56 and 128,406.24

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Solution

The fourth proportional to 280,252.22, 420,375.56 and 128,406.24 is: 192,608.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,252.22 : 420,375.56 = 128,406.24 : x
  2. Step 2: Convert to fraction form
    280,252.22/420,375.56 = 128,406.24/x
  3. Step 3: Cross multiply
    280,252.22x = 420,375.56 × 128,406.24
  4. Step 4: Simplify right side
    280,252.22x = 53,978,844,405.46
  5. Step 5: Solve for x
    x = 53,978,844,405.46/280,252.22
  6. Step 6: Final answer
    x = 192,608.09

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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.