Home / 280,989.68-421,484.04-131,179.76

Finding the Fourth Proportional to 280,989.68, 421,484.04 and 131,179.76

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Solution

The fourth proportional to 280,989.68, 421,484.04 and 131,179.76 is: 196,769.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,989.68 : 421,484.04 = 131,179.76 : x
  2. Step 2: Convert to fraction form
    280,989.68/421,484.04 = 131,179.76/x
  3. Step 3: Cross multiply
    280,989.68x = 421,484.04 × 131,179.76
  4. Step 4: Simplify right side
    280,989.68x = 55,290,175,211.03
  5. Step 5: Solve for x
    x = 55,290,175,211.03/280,989.68
  6. Step 6: Final answer
    x = 196,769.42

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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.