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Finding the Third Proportional to 411.75 and 904.50

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Solution

The third proportional to 411.75 and 904.50 is: 1,986.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.75 : 904.50 = 904.50 : x
  2. Step 2: Convert to fraction form
    411.75/904.50 = 904.50/x
  3. Step 3: Cross multiply
    411.75x = 904.50 × 904.50
  4. Step 4: Simplify right side
    411.75x = 818,120.25
  5. Step 5: Solve for x
    x = 818,120.25/411.75
  6. Step 6: Final answer
    x = 1,986.93

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.