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Finding the Third Proportional to 136,407 and 296,139

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Solution

The third proportional to 136,407 and 296,139 is: 642,916.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,407 : 296,139 = 296,139 : x
  2. Step 2: Convert to fraction form
    136,407/296,139 = 296,139/x
  3. Step 3: Cross multiply
    136,407x = 296,139 × 296,139
  4. Step 4: Simplify right side
    136,407x = 87,698,307,321
  5. Step 5: Solve for x
    x = 87,698,307,321/136,407
  6. Step 6: Final answer
    x = 642,916.47

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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.