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Finding the Fourth Proportional to 811,595.85, 1,217,559.85 and 279,047.68

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Solution

The fourth proportional to 811,595.85, 1,217,559.85 and 279,047.68 is: 418,628.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,595.85 : 1,217,559.85 = 279,047.68 : x
  2. Step 2: Convert to fraction form
    811,595.85/1,217,559.85 = 279,047.68/x
  3. Step 3: Cross multiply
    811,595.85x = 1,217,559.85 × 279,047.68
  4. Step 4: Simplify right side
    811,595.85x = 339,757,256,080.55
  5. Step 5: Solve for x
    x = 339,757,256,080.55/811,595.85
  6. Step 6: Final answer
    x = 418,628.63

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1.5x scale

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.