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Finding the Fourth Proportional to 515,404.67, 711,293.96 and 289,064.75

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Solution

The fourth proportional to 515,404.67, 711,293.96 and 289,064.75 is: 398,929.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,404.67 : 711,293.96 = 289,064.75 : x
  2. Step 2: Convert to fraction form
    515,404.67/711,293.96 = 289,064.75/x
  3. Step 3: Cross multiply
    515,404.67x = 711,293.96 × 289,064.75
  4. Step 4: Simplify right side
    515,404.67x = 205,610,010,723.91
  5. Step 5: Solve for x
    x = 205,610,010,723.91/515,404.67
  6. Step 6: Final answer
    x = 398,929.27

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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.