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Finding the Fourth Proportional to 331,421.88, 457,378.38 and 188,179.32

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Solution

The fourth proportional to 331,421.88, 457,378.38 and 188,179.32 is: 259,696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,421.88 : 457,378.38 = 188,179.32 : x
  2. Step 2: Convert to fraction form
    331,421.88/457,378.38 = 188,179.32/x
  3. Step 3: Cross multiply
    331,421.88x = 457,378.38 × 188,179.32
  4. Step 4: Simplify right side
    331,421.88x = 86,069,152,531.10
  5. Step 5: Solve for x
    x = 86,069,152,531.10/331,421.88
  6. Step 6: Final answer
    x = 259,696.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.