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Finding the Third Proportional to 420.56 and 901.69

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Solution

The third proportional to 420.56 and 901.69 is: 1,933.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.56 : 901.69 = 901.69 : x
  2. Step 2: Convert to fraction form
    420.56/901.69 = 901.69/x
  3. Step 3: Cross multiply
    420.56x = 901.69 × 901.69
  4. Step 4: Simplify right side
    420.56x = 813,040.35
  5. Step 5: Solve for x
    x = 813,040.35/420.56
  6. Step 6: Final answer
    x = 1,933.22

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.