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Finding the Third Proportional to 664.88 and 972

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Solution

The third proportional to 664.88 and 972 is: 1,420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.88 : 972 = 972 : x
  2. Step 2: Convert to fraction form
    664.88/972 = 972/x
  3. Step 3: Cross multiply
    664.88x = 972 × 972
  4. Step 4: Simplify right side
    664.88x = 944,784
  5. Step 5: Solve for x
    x = 944,784/664.88
  6. Step 6: Final answer
    x = 1,420.99

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.