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Finding the Third Proportional to 592 and 1,390

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Solution

The third proportional to 592 and 1,390 is: 3,263.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    592 : 1,390 = 1,390 : x
  2. Step 2: Convert to fraction form
    592/1,390 = 1,390/x
  3. Step 3: Cross multiply
    592x = 1,390 × 1,390
  4. Step 4: Simplify right side
    592x = 1,932,100
  5. Step 5: Solve for x
    x = 1,932,100/592
  6. Step 6: Final answer
    x = 3,263.68

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.