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Finding the Third Proportional to 189,288 and 415,440

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Solution

The third proportional to 189,288 and 415,440 is: 911,787.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,288 : 415,440 = 415,440 : x
  2. Step 2: Convert to fraction form
    189,288/415,440 = 415,440/x
  3. Step 3: Cross multiply
    189,288x = 415,440 × 415,440
  4. Step 4: Simplify right side
    189,288x = 172,590,393,600
  5. Step 5: Solve for x
    x = 172,590,393,600/189,288
  6. Step 6: Final answer
    x = 911,787.30

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.