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Finding the Third Proportional to 391,816 and 581,964

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Solution

The third proportional to 391,816 and 581,964 is: 864,390.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,816 : 581,964 = 581,964 : x
  2. Step 2: Convert to fraction form
    391,816/581,964 = 581,964/x
  3. Step 3: Cross multiply
    391,816x = 581,964 × 581,964
  4. Step 4: Simplify right side
    391,816x = 338,682,097,296
  5. Step 5: Solve for x
    x = 338,682,097,296/391,816
  6. Step 6: Final answer
    x = 864,390.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.