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Finding the Third Proportional to 428 and 934

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Solution

The third proportional to 428 and 934 is: 2,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428 : 934 = 934 : x
  2. Step 2: Convert to fraction form
    428/934 = 934/x
  3. Step 3: Cross multiply
    428x = 934 × 934
  4. Step 4: Simplify right side
    428x = 872,356
  5. Step 5: Solve for x
    x = 872,356/428
  6. Step 6: Final answer
    x = 2,038.21

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.