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Finding the Third Proportional to 623.75 and 931.75

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Solution

The third proportional to 623.75 and 931.75 is: 1,391.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.75 : 931.75 = 931.75 : x
  2. Step 2: Convert to fraction form
    623.75/931.75 = 931.75/x
  3. Step 3: Cross multiply
    623.75x = 931.75 × 931.75
  4. Step 4: Simplify right side
    623.75x = 868,158.06
  5. Step 5: Solve for x
    x = 868,158.06/623.75
  6. Step 6: Final answer
    x = 1,391.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.