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Finding the Fourth Proportional to 308,230.80, 425,355.88 and 172,270.48

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Solution

The fourth proportional to 308,230.80, 425,355.88 and 172,270.48 is: 237,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,230.80 : 425,355.88 = 172,270.48 : x
  2. Step 2: Convert to fraction form
    308,230.80/425,355.88 = 172,270.48/x
  3. Step 3: Cross multiply
    308,230.80x = 425,355.88 × 172,270.48
  4. Step 4: Simplify right side
    308,230.80x = 73,276,261,618.42
  5. Step 5: Solve for x
    x = 73,276,261,618.42/308,230.80
  6. Step 6: Final answer
    x = 237,731.80

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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.