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Finding the Fourth Proportional to 311,760.72, 430,229.70 and 168,520.68

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Solution

The fourth proportional to 311,760.72, 430,229.70 and 168,520.68 is: 232,558.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,760.72 : 430,229.70 = 168,520.68 : x
  2. Step 2: Convert to fraction form
    311,760.72/430,229.70 = 168,520.68/x
  3. Step 3: Cross multiply
    311,760.72x = 430,229.70 × 168,520.68
  4. Step 4: Simplify right side
    311,760.72x = 72,502,601,600.20
  5. Step 5: Solve for x
    x = 72,502,601,600.20/311,760.72
  6. Step 6: Final answer
    x = 232,558.49

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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.