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Finding the Third Proportional to 1,431 and 3,715.50

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Solution

The third proportional to 1,431 and 3,715.50 is: 9,647.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431 : 3,715.50 = 3,715.50 : x
  2. Step 2: Convert to fraction form
    1,431/3,715.50 = 3,715.50/x
  3. Step 3: Cross multiply
    1,431x = 3,715.50 × 3,715.50
  4. Step 4: Simplify right side
    1,431x = 13,804,940.25
  5. Step 5: Solve for x
    x = 13,804,940.25/1,431
  6. Step 6: Final answer
    x = 9,647.06

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.