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Finding the Fourth Proportional to 311,499.78, 429,903.36 and 190,722.30

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Solution

The fourth proportional to 311,499.78, 429,903.36 and 190,722.30 is: 263,217.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,499.78 : 429,903.36 = 190,722.30 : x
  2. Step 2: Convert to fraction form
    311,499.78/429,903.36 = 190,722.30/x
  3. Step 3: Cross multiply
    311,499.78x = 429,903.36 × 190,722.30
  4. Step 4: Simplify right side
    311,499.78x = 81,992,157,596.93
  5. Step 5: Solve for x
    x = 81,992,157,596.93/311,499.78
  6. Step 6: Final answer
    x = 263,217.39

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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.