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Finding the Fourth Proportional to 695,812.11, 960,224.40 and 389,889.15

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Solution

The fourth proportional to 695,812.11, 960,224.40 and 389,889.15 is: 538,049.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,812.11 : 960,224.40 = 389,889.15 : x
  2. Step 2: Convert to fraction form
    695,812.11/960,224.40 = 389,889.15/x
  3. Step 3: Cross multiply
    695,812.11x = 960,224.40 × 389,889.15
  4. Step 4: Simplify right side
    695,812.11x = 374,381,075,125.26
  5. Step 5: Solve for x
    x = 374,381,075,125.26/695,812.11
  6. Step 6: Final answer
    x = 538,049.09

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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.