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Finding the Third Proportional to 139,490 and 286,324

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Solution

The third proportional to 139,490 and 286,324 is: 587,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,490 : 286,324 = 286,324 : x
  2. Step 2: Convert to fraction form
    139,490/286,324 = 286,324/x
  3. Step 3: Cross multiply
    139,490x = 286,324 × 286,324
  4. Step 4: Simplify right side
    139,490x = 81,981,432,976
  5. Step 5: Solve for x
    x = 81,981,432,976/139,490
  6. Step 6: Final answer
    x = 587,722.65

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.