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Finding the Third Proportional to 289,673 and 424,139

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Solution

The third proportional to 289,673 and 424,139 is: 621,024.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,673 : 424,139 = 424,139 : x
  2. Step 2: Convert to fraction form
    289,673/424,139 = 424,139/x
  3. Step 3: Cross multiply
    289,673x = 424,139 × 424,139
  4. Step 4: Simplify right side
    289,673x = 179,893,891,321
  5. Step 5: Solve for x
    x = 179,893,891,321/289,673
  6. Step 6: Final answer
    x = 621,024.02

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.