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Finding the Fourth Proportional to 520,756.56, 718,610.13 and 291,274.11

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Solution

The fourth proportional to 520,756.56, 718,610.13 and 291,274.11 is: 401,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,756.56 : 718,610.13 = 291,274.11 : x
  2. Step 2: Convert to fraction form
    520,756.56/718,610.13 = 291,274.11/x
  3. Step 3: Cross multiply
    520,756.56x = 718,610.13 × 291,274.11
  4. Step 4: Simplify right side
    520,756.56x = 209,312,526,052.73
  5. Step 5: Solve for x
    x = 209,312,526,052.73/520,756.56
  6. Step 6: Final answer
    x = 401,939.30

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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.