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Finding the Fourth Proportional to 308,599.20, 425,906.10 and 172,640.70

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Solution

The fourth proportional to 308,599.20, 425,906.10 and 172,640.70 is: 238,266.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,599.20 : 425,906.10 = 172,640.70 : x
  2. Step 2: Convert to fraction form
    308,599.20/425,906.10 = 172,640.70/x
  3. Step 3: Cross multiply
    308,599.20x = 425,906.10 × 172,640.70
  4. Step 4: Simplify right side
    308,599.20x = 73,528,727,238.27
  5. Step 5: Solve for x
    x = 73,528,727,238.27/308,599.20
  6. Step 6: Final answer
    x = 238,266.10

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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.