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Finding the Fourth Proportional to 311,043.80, 429,213.07 and 173,212.32

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Solution

The fourth proportional to 311,043.80, 429,213.07 and 173,212.32 is: 239,017.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,043.80 : 429,213.07 = 173,212.32 : x
  2. Step 2: Convert to fraction form
    311,043.80/429,213.07 = 173,212.32/x
  3. Step 3: Cross multiply
    311,043.80x = 429,213.07 × 173,212.32
  4. Step 4: Simplify right side
    311,043.80x = 74,344,989,586.44
  5. Step 5: Solve for x
    x = 74,344,989,586.44/311,043.80
  6. Step 6: Final answer
    x = 239,017.75

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1.5x scale

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.