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Finding the Third Proportional to 3,215 and 4,710.50

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Solution

The third proportional to 3,215 and 4,710.50 is: 6,901.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215 : 4,710.50 = 4,710.50 : x
  2. Step 2: Convert to fraction form
    3,215/4,710.50 = 4,710.50/x
  3. Step 3: Cross multiply
    3,215x = 4,710.50 × 4,710.50
  4. Step 4: Simplify right side
    3,215x = 22,188,810.25
  5. Step 5: Solve for x
    x = 22,188,810.25/3,215
  6. Step 6: Final answer
    x = 6,901.65

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.