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Finding the Fourth Proportional to 665,544.33, 918,894.51 and 393,699.56

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Solution

The fourth proportional to 665,544.33, 918,894.51 and 393,699.56 is: 543,567.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,544.33 : 918,894.51 = 393,699.56 : x
  2. Step 2: Convert to fraction form
    665,544.33/918,894.51 = 393,699.56/x
  3. Step 3: Cross multiply
    665,544.33x = 918,894.51 × 393,699.56
  4. Step 4: Simplify right side
    665,544.33x = 361,768,359,678.94
  5. Step 5: Solve for x
    x = 361,768,359,678.94/665,544.33
  6. Step 6: Final answer
    x = 543,567.64

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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.