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Finding the Fourth Proportional to 311,843.12, 430,343.14 and 168,602.83

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Solution

The fourth proportional to 311,843.12, 430,343.14 and 168,602.83 is: 232,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,843.12 : 430,343.14 = 168,602.83 : x
  2. Step 2: Convert to fraction form
    311,843.12/430,343.14 = 168,602.83/x
  3. Step 3: Cross multiply
    311,843.12x = 430,343.14 × 168,602.83
  4. Step 4: Simplify right side
    311,843.12x = 72,557,069,123.37
  5. Step 5: Solve for x
    x = 72,557,069,123.37/311,843.12
  6. Step 6: Final answer
    x = 232,671.70

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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.