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Finding the Fourth Proportional to 391,777.46, 587,666.19 and 258,626.52

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Solution

The fourth proportional to 391,777.46, 587,666.19 and 258,626.52 is: 387,939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,777.46 : 587,666.19 = 258,626.52 : x
  2. Step 2: Convert to fraction form
    391,777.46/587,666.19 = 258,626.52/x
  3. Step 3: Cross multiply
    391,777.46x = 587,666.19 × 258,626.52
  4. Step 4: Simplify right side
    391,777.46x = 151,986,061,641.36
  5. Step 5: Solve for x
    x = 151,986,061,641.36/391,777.46
  6. Step 6: Final answer
    x = 387,939.78

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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.