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Finding the Fourth Proportional to 308,113.70, 425,193.98 and 172,171.06

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Solution

The fourth proportional to 308,113.70, 425,193.98 and 172,171.06 is: 237,594.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,113.70 : 425,193.98 = 172,171.06 : x
  2. Step 2: Convert to fraction form
    308,113.70/425,193.98 = 172,171.06/x
  3. Step 3: Cross multiply
    308,113.70x = 425,193.98 × 172,171.06
  4. Step 4: Simplify right side
    308,113.70x = 73,206,096,318.38
  5. Step 5: Solve for x
    x = 73,206,096,318.38/308,113.70
  6. Step 6: Final answer
    x = 237,594.43

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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.