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Finding the Fourth Proportional to 391,705.38, 540,718.77 and 264,553.20

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Solution

The fourth proportional to 391,705.38, 540,718.77 and 264,553.20 is: 365,195.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,705.38 : 540,718.77 = 264,553.20 : x
  2. Step 2: Convert to fraction form
    391,705.38/540,718.77 = 264,553.20/x
  3. Step 3: Cross multiply
    391,705.38x = 540,718.77 × 264,553.20
  4. Step 4: Simplify right side
    391,705.38x = 143,048,880,903.56
  5. Step 5: Solve for x
    x = 143,048,880,903.56/391,705.38
  6. Step 6: Final answer
    x = 365,195.09

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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.