Home / 311,811.53-430,219.96-190,908.70

Finding the Fourth Proportional to 311,811.53, 430,219.96 and 190,908.70

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Solution

The fourth proportional to 311,811.53, 430,219.96 and 190,908.70 is: 263,405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,811.53 : 430,219.96 = 190,908.70 : x
  2. Step 2: Convert to fraction form
    311,811.53/430,219.96 = 190,908.70/x
  3. Step 3: Cross multiply
    311,811.53x = 430,219.96 × 190,908.70
  4. Step 4: Simplify right side
    311,811.53x = 82,132,731,724.83
  5. Step 5: Solve for x
    x = 82,132,731,724.83/311,811.53
  6. Step 6: Final answer
    x = 263,405.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.