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Finding the Third Proportional to 210,381 and 315,543

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Solution

The third proportional to 210,381 and 315,543 is: 473,271.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,381 : 315,543 = 315,543 : x
  2. Step 2: Convert to fraction form
    210,381/315,543 = 315,543/x
  3. Step 3: Cross multiply
    210,381x = 315,543 × 315,543
  4. Step 4: Simplify right side
    210,381x = 99,567,384,849
  5. Step 5: Solve for x
    x = 99,567,384,849/210,381
  6. Step 6: Final answer
    x = 473,271.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.