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Finding the Fourth Proportional to 391,705.87, 540,719.45 and 264,553.69

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Solution

The fourth proportional to 391,705.87, 540,719.45 and 264,553.69 is: 365,195.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,705.87 : 540,719.45 = 264,553.69 : x
  2. Step 2: Convert to fraction form
    391,705.87/540,719.45 = 264,553.69/x
  3. Step 3: Cross multiply
    391,705.87x = 540,719.45 × 264,553.69
  4. Step 4: Simplify right side
    391,705.87x = 143,049,325,752.27
  5. Step 5: Solve for x
    x = 143,049,325,752.27/391,705.87
  6. Step 6: Final answer
    x = 365,195.77

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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.