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Finding the Fourth Proportional to 311,437.77, 429,336.23 and 221,858.25

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Solution

The fourth proportional to 311,437.77, 429,336.23 and 221,858.25 is: 305,845.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,437.77 : 429,336.23 = 221,858.25 : x
  2. Step 2: Convert to fraction form
    311,437.77/429,336.23 = 221,858.25/x
  3. Step 3: Cross multiply
    311,437.77x = 429,336.23 × 221,858.25
  4. Step 4: Simplify right side
    311,437.77x = 95,251,783,540.11
  5. Step 5: Solve for x
    x = 95,251,783,540.11/311,437.77
  6. Step 6: Final answer
    x = 305,845.32

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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.