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Finding the Fourth Proportional to 391,101.69, 585,649.25 and 270,988.01

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Solution

The fourth proportional to 391,101.69, 585,649.25 and 270,988.01 is: 405,786.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,101.69 : 585,649.25 = 270,988.01 : x
  2. Step 2: Convert to fraction form
    391,101.69/585,649.25 = 270,988.01/x
  3. Step 3: Cross multiply
    391,101.69x = 585,649.25 × 270,988.01
  4. Step 4: Simplify right side
    391,101.69x = 158,703,924,815.49
  5. Step 5: Solve for x
    x = 158,703,924,815.49/391,101.69
  6. Step 6: Final answer
    x = 405,786.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.