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Finding the Fourth Proportional to 311,684.45, 430,124.63 and 177,548.45

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Solution

The fourth proportional to 311,684.45, 430,124.63 and 177,548.45 is: 245,016.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,684.45 : 430,124.63 = 177,548.45 : x
  2. Step 2: Convert to fraction form
    311,684.45/430,124.63 = 177,548.45/x
  3. Step 3: Cross multiply
    311,684.45x = 430,124.63 × 177,548.45
  4. Step 4: Simplify right side
    311,684.45x = 76,367,958,324.96
  5. Step 5: Solve for x
    x = 76,367,958,324.96/311,684.45
  6. Step 6: Final answer
    x = 245,016.91

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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.