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Finding the Third Proportional to 309,700.50 and 489,479.50

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Solution

The third proportional to 309,700.50 and 489,479.50 is: 773,618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,700.50 : 489,479.50 = 489,479.50 : x
  2. Step 2: Convert to fraction form
    309,700.50/489,479.50 = 489,479.50/x
  3. Step 3: Cross multiply
    309,700.50x = 489,479.50 × 489,479.50
  4. Step 4: Simplify right side
    309,700.50x = 239,590,180,920.25
  5. Step 5: Solve for x
    x = 239,590,180,920.25/309,700.50
  6. Step 6: Final answer
    x = 773,618.97

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.