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Finding the Fourth Proportional to 311,103.22, 429,346.08 and 188,631.22

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Solution

The fourth proportional to 311,103.22, 429,346.08 and 188,631.22 is: 260,325.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,103.22 : 429,346.08 = 188,631.22 : x
  2. Step 2: Convert to fraction form
    311,103.22/429,346.08 = 188,631.22/x
  3. Step 3: Cross multiply
    311,103.22x = 429,346.08 × 188,631.22
  4. Step 4: Simplify right side
    311,103.22x = 80,988,074,872.62
  5. Step 5: Solve for x
    x = 80,988,074,872.62/311,103.22
  6. Step 6: Final answer
    x = 260,325.42

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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.