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Finding the Fourth Proportional to 311,318.88, 429,652.35 and 190,540.59

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Solution

The fourth proportional to 311,318.88, 429,652.35 and 190,540.59 is: 262,965.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,318.88 : 429,652.35 = 190,540.59 : x
  2. Step 2: Convert to fraction form
    311,318.88/429,652.35 = 190,540.59/x
  3. Step 3: Cross multiply
    311,318.88x = 429,652.35 × 190,540.59
  4. Step 4: Simplify right side
    311,318.88x = 81,866,212,263.89
  5. Step 5: Solve for x
    x = 81,866,212,263.89/311,318.88
  6. Step 6: Final answer
    x = 262,965.78

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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.