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Finding the Third Proportional to 208,290 and 431,350

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Solution

The third proportional to 208,290 and 431,350 is: 893,287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,290 : 431,350 = 431,350 : x
  2. Step 2: Convert to fraction form
    208,290/431,350 = 431,350/x
  3. Step 3: Cross multiply
    208,290x = 431,350 × 431,350
  4. Step 4: Simplify right side
    208,290x = 186,062,822,500
  5. Step 5: Solve for x
    x = 186,062,822,500/208,290
  6. Step 6: Final answer
    x = 893,287.35

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.