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Finding the Fourth Proportional to 311,430.30, 429,766.71 and 190,571.22

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Solution

The fourth proportional to 311,430.30, 429,766.71 and 190,571.22 is: 262,983.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,430.30 : 429,766.71 = 190,571.22 : x
  2. Step 2: Convert to fraction form
    311,430.30/429,766.71 = 190,571.22/x
  3. Step 3: Cross multiply
    311,430.30x = 429,766.71 × 190,571.22
  4. Step 4: Simplify right side
    311,430.30x = 81,901,166,240.09
  5. Step 5: Solve for x
    x = 81,901,166,240.09/311,430.30
  6. Step 6: Final answer
    x = 262,983.94

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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.