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Finding the Fourth Proportional to 391,144.51, 586,716.78 and 251,788.87

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Solution

The fourth proportional to 391,144.51, 586,716.78 and 251,788.87 is: 377,683.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,144.51 : 586,716.78 = 251,788.87 : x
  2. Step 2: Convert to fraction form
    391,144.51/586,716.78 = 251,788.87/x
  3. Step 3: Cross multiply
    391,144.51x = 586,716.78 × 251,788.87
  4. Step 4: Simplify right side
    391,144.51x = 147,728,752,112.66
  5. Step 5: Solve for x
    x = 147,728,752,112.66/391,144.51
  6. Step 6: Final answer
    x = 377,683.31

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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.