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Finding the Third Proportional to 964 and 1,218.25

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Solution

The third proportional to 964 and 1,218.25 is: 1,539.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    964 : 1,218.25 = 1,218.25 : x
  2. Step 2: Convert to fraction form
    964/1,218.25 = 1,218.25/x
  3. Step 3: Cross multiply
    964x = 1,218.25 × 1,218.25
  4. Step 4: Simplify right side
    964x = 1,484,133.06
  5. Step 5: Solve for x
    x = 1,484,133.06/964
  6. Step 6: Final answer
    x = 1,539.56

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Why These Related Problems?

These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.