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Finding the Fourth Proportional to 311,336.31, 429,676.47 and 190,558.02

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Solution

The fourth proportional to 311,336.31, 429,676.47 and 190,558.02 is: 262,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,336.31 : 429,676.47 = 190,558.02 : x
  2. Step 2: Convert to fraction form
    311,336.31/429,676.47 = 190,558.02/x
  3. Step 3: Cross multiply
    311,336.31x = 429,676.47 × 190,558.02
  4. Step 4: Simplify right side
    311,336.31x = 81,878,297,363.79
  5. Step 5: Solve for x
    x = 81,878,297,363.79/311,336.31
  6. Step 6: Final answer
    x = 262,989.88

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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.