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Finding the Fourth Proportional to 311,840.80, 430,407.06 and 197,046.56

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Solution

The fourth proportional to 311,840.80, 430,407.06 and 197,046.56 is: 271,966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,840.80 : 430,407.06 = 197,046.56 : x
  2. Step 2: Convert to fraction form
    311,840.80/430,407.06 = 197,046.56/x
  3. Step 3: Cross multiply
    311,840.80x = 430,407.06 × 197,046.56
  4. Step 4: Simplify right side
    311,840.80x = 84,810,230,572.71
  5. Step 5: Solve for x
    x = 84,810,230,572.71/311,840.80
  6. Step 6: Final answer
    x = 271,966.43

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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.