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Finding the Third Proportional to 318,101.25 and 691,423.50

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Solution

The third proportional to 318,101.25 and 691,423.50 is: 1,502,875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,101.25 : 691,423.50 = 691,423.50 : x
  2. Step 2: Convert to fraction form
    318,101.25/691,423.50 = 691,423.50/x
  3. Step 3: Cross multiply
    318,101.25x = 691,423.50 × 691,423.50
  4. Step 4: Simplify right side
    318,101.25x = 478,066,456,352.25
  5. Step 5: Solve for x
    x = 478,066,456,352.25/318,101.25
  6. Step 6: Final answer
    x = 1,502,875.13

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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.