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Finding the Fourth Proportional to 311,960.55, 430,505.65 and 176,023.32

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Solution

The fourth proportional to 311,960.55, 430,505.65 and 176,023.32 is: 242,912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,960.55 : 430,505.65 = 176,023.32 : x
  2. Step 2: Convert to fraction form
    311,960.55/430,505.65 = 176,023.32/x
  3. Step 3: Cross multiply
    311,960.55x = 430,505.65 × 176,023.32
  4. Step 4: Simplify right side
    311,960.55x = 75,779,033,791.76
  5. Step 5: Solve for x
    x = 75,779,033,791.76/311,960.55
  6. Step 6: Final answer
    x = 242,912.23

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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.