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Finding the Third Proportional to 189,290 and 416,988

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Solution

The third proportional to 189,290 and 416,988 is: 918,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,290 : 416,988 = 416,988 : x
  2. Step 2: Convert to fraction form
    189,290/416,988 = 416,988/x
  3. Step 3: Cross multiply
    189,290x = 416,988 × 416,988
  4. Step 4: Simplify right side
    189,290x = 173,878,992,144
  5. Step 5: Solve for x
    x = 173,878,992,144/189,290
  6. Step 6: Final answer
    x = 918,585.20

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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.