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Finding the Third Proportional to 391,420.69 and 606,070.69

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Solution

The third proportional to 391,420.69 and 606,070.69 is: 938,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,420.69 : 606,070.69 = 606,070.69 : x
  2. Step 2: Convert to fraction form
    391,420.69/606,070.69 = 606,070.69/x
  3. Step 3: Cross multiply
    391,420.69x = 606,070.69 × 606,070.69
  4. Step 4: Simplify right side
    391,420.69x = 367,321,678,246.72
  5. Step 5: Solve for x
    x = 367,321,678,246.72/391,420.69
  6. Step 6: Final answer
    x = 938,431.95

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.