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Finding the Fourth Proportional to 391,716.10, 587,571.54 and 189,075.68

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Solution

The fourth proportional to 391,716.10, 587,571.54 and 189,075.68 is: 283,612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,716.10 : 587,571.54 = 189,075.68 : x
  2. Step 2: Convert to fraction form
    391,716.10/587,571.54 = 189,075.68/x
  3. Step 3: Cross multiply
    391,716.10x = 587,571.54 × 189,075.68
  4. Step 4: Simplify right side
    391,716.10x = 111,095,488,474.15
  5. Step 5: Solve for x
    x = 111,095,488,474.15/391,716.10
  6. Step 6: Final answer
    x = 283,612.26

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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.