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Finding the Third Proportional to 3,957 and 7,290

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Solution

The third proportional to 3,957 and 7,290 is: 13,430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957 : 7,290 = 7,290 : x
  2. Step 2: Convert to fraction form
    3,957/7,290 = 7,290/x
  3. Step 3: Cross multiply
    3,957x = 7,290 × 7,290
  4. Step 4: Simplify right side
    3,957x = 53,144,100
  5. Step 5: Solve for x
    x = 53,144,100/3,957
  6. Step 6: Final answer
    x = 13,430.40

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.