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Finding the Third Proportional to 208,791 and 455,220

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Solution

The third proportional to 208,791 and 455,220 is: 992,500.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,791 : 455,220 = 455,220 : x
  2. Step 2: Convert to fraction form
    208,791/455,220 = 455,220/x
  3. Step 3: Cross multiply
    208,791x = 455,220 × 455,220
  4. Step 4: Simplify right side
    208,791x = 207,225,248,400
  5. Step 5: Solve for x
    x = 207,225,248,400/208,791
  6. Step 6: Final answer
    x = 992,500.87

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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.