Home / 280,390.14-420,525.07-80,673.30

Finding the Fourth Proportional to 280,390.14, 420,525.07 and 80,673.30

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Solution

The fourth proportional to 280,390.14, 420,525.07 and 80,673.30 is: 120,992.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,390.14 : 420,525.07 = 80,673.30 : x
  2. Step 2: Convert to fraction form
    280,390.14/420,525.07 = 80,673.30/x
  3. Step 3: Cross multiply
    280,390.14x = 420,525.07 × 80,673.30
  4. Step 4: Simplify right side
    280,390.14x = 33,925,144,927.95
  5. Step 5: Solve for x
    x = 33,925,144,927.95/280,390.14
  6. Step 6: Final answer
    x = 120,992.65

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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.