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Finding the Fourth Proportional to 311,960.73, 430,505.81 and 168,720.77

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Solution

The fourth proportional to 311,960.73, 430,505.81 and 168,720.77 is: 232,834.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,960.73 : 430,505.81 = 168,720.77 : x
  2. Step 2: Convert to fraction form
    311,960.73/430,505.81 = 168,720.77/x
  3. Step 3: Cross multiply
    311,960.73x = 430,505.81 × 168,720.77
  4. Step 4: Simplify right side
    311,960.73x = 72,635,268,756.54
  5. Step 5: Solve for x
    x = 72,635,268,756.54/311,960.73
  6. Step 6: Final answer
    x = 232,834.65

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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.