Home / 280,240,216.20-420,360,324.30-72,978,226.20

Finding the Fourth Proportional to 280,240,216.20, 420,360,324.30 and 72,978,226.20

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Solution

The fourth proportional to 280,240,216.20, 420,360,324.30 and 72,978,226.20 is: 109,467,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,240,216.20 : 420,360,324.30 = 72,978,226.20 : x
  2. Step 2: Convert to fraction form
    280,240,216.20/420,360,324.30 = 72,978,226.20/x
  3. Step 3: Cross multiply
    280,240,216.20x = 420,360,324.30 × 72,978,226.20
  4. Step 4: Simplify right side
    280,240,216.20x = 30,677,150,832,270,760
  5. Step 5: Solve for x
    x = 30,677,150,832,270,760/280,240,216.20
  6. Step 6: Final answer
    x = 109,467,339.30

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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.