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Finding the Third Proportional to 291,218 and 636,316

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Solution

The third proportional to 291,218 and 636,316 is: 1,390,360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,218 : 636,316 = 636,316 : x
  2. Step 2: Convert to fraction form
    291,218/636,316 = 636,316/x
  3. Step 3: Cross multiply
    291,218x = 636,316 × 636,316
  4. Step 4: Simplify right side
    291,218x = 404,898,051,856
  5. Step 5: Solve for x
    x = 404,898,051,856/291,218
  6. Step 6: Final answer
    x = 1,390,360.66

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.