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Finding the Third Proportional to 1,521 and 3,907.50

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Solution

The third proportional to 1,521 and 3,907.50 is: 10,038.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521 : 3,907.50 = 3,907.50 : x
  2. Step 2: Convert to fraction form
    1,521/3,907.50 = 3,907.50/x
  3. Step 3: Cross multiply
    1,521x = 3,907.50 × 3,907.50
  4. Step 4: Simplify right side
    1,521x = 15,268,556.25
  5. Step 5: Solve for x
    x = 15,268,556.25/1,521
  6. Step 6: Final answer
    x = 10,038.50

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Why These Related Problems?

These problems maintain the same ratio (2.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.