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Finding the Fourth Proportional to 256,236.72, 383,839.92 and 127,765.36

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Solution

The fourth proportional to 256,236.72, 383,839.92 and 127,765.36 is: 191,391.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,236.72 : 383,839.92 = 127,765.36 : x
  2. Step 2: Convert to fraction form
    256,236.72/383,839.92 = 127,765.36/x
  3. Step 3: Cross multiply
    256,236.72x = 383,839.92 × 127,765.36
  4. Step 4: Simplify right side
    256,236.72x = 49,041,445,561.17
  5. Step 5: Solve for x
    x = 49,041,445,561.17/256,236.72
  6. Step 6: Final answer
    x = 191,391.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.