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Finding the Fourth Proportional to 311,390.67, 429,750.87 and 190,611.77

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Solution

The fourth proportional to 311,390.67, 429,750.87 and 190,611.77 is: 263,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,390.67 : 429,750.87 = 190,611.77 : x
  2. Step 2: Convert to fraction form
    311,390.67/429,750.87 = 190,611.77/x
  3. Step 3: Cross multiply
    311,390.67x = 429,750.87 × 190,611.77
  4. Step 4: Simplify right side
    311,390.67x = 81,915,575,064.12
  5. Step 5: Solve for x
    x = 81,915,575,064.12/311,390.67
  6. Step 6: Final answer
    x = 263,063.68

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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.