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Finding the Third Proportional to 321,243 and 470,344.50

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Solution

The third proportional to 321,243 and 470,344.50 is: 688,649.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,243 : 470,344.50 = 470,344.50 : x
  2. Step 2: Convert to fraction form
    321,243/470,344.50 = 470,344.50/x
  3. Step 3: Cross multiply
    321,243x = 470,344.50 × 470,344.50
  4. Step 4: Simplify right side
    321,243x = 221,223,948,680.25
  5. Step 5: Solve for x
    x = 221,223,948,680.25/321,243
  6. Step 6: Final answer
    x = 688,649.87

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.