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Finding the Third Proportional to 289,287 and 626,688

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Solution

The third proportional to 289,287 and 626,688 is: 1,357,606.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,287 : 626,688 = 626,688 : x
  2. Step 2: Convert to fraction form
    289,287/626,688 = 626,688/x
  3. Step 3: Cross multiply
    289,287x = 626,688 × 626,688
  4. Step 4: Simplify right side
    289,287x = 392,737,849,344
  5. Step 5: Solve for x
    x = 392,737,849,344/289,287
  6. Step 6: Final answer
    x = 1,357,606.28

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.