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Finding the Third Proportional to 578,856 and 905,346

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Solution

The third proportional to 578,856 and 905,346 is: 1,415,984.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,856 : 905,346 = 905,346 : x
  2. Step 2: Convert to fraction form
    578,856/905,346 = 905,346/x
  3. Step 3: Cross multiply
    578,856x = 905,346 × 905,346
  4. Step 4: Simplify right side
    578,856x = 819,651,379,716
  5. Step 5: Solve for x
    x = 819,651,379,716/578,856
  6. Step 6: Final answer
    x = 1,415,984.94

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.