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Finding the Third Proportional to 2,445 and 4,290

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Solution

The third proportional to 2,445 and 4,290 is: 7,527.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445 : 4,290 = 4,290 : x
  2. Step 2: Convert to fraction form
    2,445/4,290 = 4,290/x
  3. Step 3: Cross multiply
    2,445x = 4,290 × 4,290
  4. Step 4: Simplify right side
    2,445x = 18,404,100
  5. Step 5: Solve for x
    x = 18,404,100/2,445
  6. Step 6: Final answer
    x = 7,527.24

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.