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Finding the Fourth Proportional to 311,687.72, 430,129.12 and 177,551.72

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Solution

The fourth proportional to 311,687.72, 430,129.12 and 177,551.72 is: 245,021.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,687.72 : 430,129.12 = 177,551.72 : x
  2. Step 2: Convert to fraction form
    311,687.72/430,129.12 = 177,551.72/x
  3. Step 3: Cross multiply
    311,687.72x = 430,129.12 × 177,551.72
  4. Step 4: Simplify right side
    311,687.72x = 76,370,165,078.09
  5. Step 5: Solve for x
    x = 76,370,165,078.09/311,687.72
  6. Step 6: Final answer
    x = 245,021.41

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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.