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Finding the Third Proportional to 320,427 and 691,516.50

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Solution

The third proportional to 320,427 and 691,516.50 is: 1,492,368.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,427 : 691,516.50 = 691,516.50 : x
  2. Step 2: Convert to fraction form
    320,427/691,516.50 = 691,516.50/x
  3. Step 3: Cross multiply
    320,427x = 691,516.50 × 691,516.50
  4. Step 4: Simplify right side
    320,427x = 478,195,069,772.25
  5. Step 5: Solve for x
    x = 478,195,069,772.25/320,427
  6. Step 6: Final answer
    x = 1,492,368.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.