Home / 280,320.90-420,231.20-102,786.45

Finding the Fourth Proportional to 280,320.90, 420,231.20 and 102,786.45

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Solution

The fourth proportional to 280,320.90, 420,231.20 and 102,786.45 is: 154,087.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,320.90 : 420,231.20 = 102,786.45 : x
  2. Step 2: Convert to fraction form
    280,320.90/420,231.20 = 102,786.45/x
  3. Step 3: Cross multiply
    280,320.90x = 420,231.20 × 102,786.45
  4. Step 4: Simplify right side
    280,320.90x = 43,194,072,713.31
  5. Step 5: Solve for x
    x = 43,194,072,713.31/280,320.90
  6. Step 6: Final answer
    x = 154,087.95

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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.