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Finding the Third Proportional to 428.63 and 904.50

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Solution

The third proportional to 428.63 and 904.50 is: 1,908.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.63 : 904.50 = 904.50 : x
  2. Step 2: Convert to fraction form
    428.63/904.50 = 904.50/x
  3. Step 3: Cross multiply
    428.63x = 904.50 × 904.50
  4. Step 4: Simplify right side
    428.63x = 818,120.25
  5. Step 5: Solve for x
    x = 818,120.25/428.63
  6. Step 6: Final answer
    x = 1,908.71

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.