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Finding the Fourth Proportional to 515,610.78, 711,532.17 and 286,154.75

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Solution

The fourth proportional to 515,610.78, 711,532.17 and 286,154.75 is: 394,887.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,610.78 : 711,532.17 = 286,154.75 : x
  2. Step 2: Convert to fraction form
    515,610.78/711,532.17 = 286,154.75/x
  3. Step 3: Cross multiply
    515,610.78x = 711,532.17 × 286,154.75
  4. Step 4: Simplify right side
    515,610.78x = 203,608,306,665.65
  5. Step 5: Solve for x
    x = 203,608,306,665.65/515,610.78
  6. Step 6: Final answer
    x = 394,887.61

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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.