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Finding the Fourth Proportional to 311,627.85, 430,046.55 and 168,387.88

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Solution

The fourth proportional to 311,627.85, 430,046.55 and 168,387.88 is: 232,375.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,627.85 : 430,046.55 = 168,387.88 : x
  2. Step 2: Convert to fraction form
    311,627.85/430,046.55 = 168,387.88/x
  3. Step 3: Cross multiply
    311,627.85x = 430,046.55 × 168,387.88
  4. Step 4: Simplify right side
    311,627.85x = 72,414,626,855.81
  5. Step 5: Solve for x
    x = 72,414,626,855.81/311,627.85
  6. Step 6: Final answer
    x = 232,375.34

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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.