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Finding the Third Proportional to 530 and 1,113

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Solution

The third proportional to 530 and 1,113 is: 2,337.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    530 : 1,113 = 1,113 : x
  2. Step 2: Convert to fraction form
    530/1,113 = 1,113/x
  3. Step 3: Cross multiply
    530x = 1,113 × 1,113
  4. Step 4: Simplify right side
    530x = 1,238,769
  5. Step 5: Solve for x
    x = 1,238,769/530
  6. Step 6: Final answer
    x = 2,337.30

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.