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Finding the Fourth Proportional to 311,699.13, 429,945.33 and 216,170.97

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Solution

The fourth proportional to 311,699.13, 429,945.33 and 216,170.97 is: 298,177.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,699.13 : 429,945.33 = 216,170.97 : x
  2. Step 2: Convert to fraction form
    311,699.13/429,945.33 = 216,170.97/x
  3. Step 3: Cross multiply
    311,699.13x = 429,945.33 × 216,170.97
  4. Step 4: Simplify right side
    311,699.13x = 92,941,699,033.07
  5. Step 5: Solve for x
    x = 92,941,699,033.07/311,699.13
  6. Step 6: Final answer
    x = 298,177.60

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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.