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Finding the Fourth Proportional to 186,290.78, 256,591.53 and 143,187.84

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Solution

The fourth proportional to 186,290.78, 256,591.53 and 143,187.84 is: 197,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,290.78 : 256,591.53 = 143,187.84 : x
  2. Step 2: Convert to fraction form
    186,290.78/256,591.53 = 143,187.84/x
  3. Step 3: Cross multiply
    186,290.78x = 256,591.53 × 143,187.84
  4. Step 4: Simplify right side
    186,290.78x = 36,740,786,943.00
  5. Step 5: Solve for x
    x = 36,740,786,943.00/186,290.78
  6. Step 6: Final answer
    x = 197,222.79

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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.