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Finding the Fourth Proportional to 312,256.76, 430,922.70 and 189,707.42

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Solution

The fourth proportional to 312,256.76, 430,922.70 and 189,707.42 is: 261,801.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,256.76 : 430,922.70 = 189,707.42 : x
  2. Step 2: Convert to fraction form
    312,256.76/430,922.70 = 189,707.42/x
  3. Step 3: Cross multiply
    312,256.76x = 430,922.70 × 189,707.42
  4. Step 4: Simplify right side
    312,256.76x = 81,749,233,636.43
  5. Step 5: Solve for x
    x = 81,749,233,636.43/312,256.76
  6. Step 6: Final answer
    x = 261,801.33

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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.