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Finding the Fourth Proportional to 691,120.70, 953,751.03 and 385,216.51

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Solution

The fourth proportional to 691,120.70, 953,751.03 and 385,216.51 is: 531,601.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,120.70 : 953,751.03 = 385,216.51 : x
  2. Step 2: Convert to fraction form
    691,120.70/953,751.03 = 385,216.51/x
  3. Step 3: Cross multiply
    691,120.70x = 953,751.03 × 385,216.51
  4. Step 4: Simplify right side
    691,120.70x = 367,400,641,259.42
  5. Step 5: Solve for x
    x = 367,400,641,259.42/691,120.70
  6. Step 6: Final answer
    x = 531,601.27

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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.