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Finding the Fourth Proportional to 308,497.20, 425,723.12 and 172,529.60

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Solution

The fourth proportional to 308,497.20, 425,723.12 and 172,529.60 is: 238,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,497.20 : 425,723.12 = 172,529.60 : x
  2. Step 2: Convert to fraction form
    308,497.20/425,723.12 = 172,529.60/x
  3. Step 3: Cross multiply
    308,497.20x = 425,723.12 × 172,529.60
  4. Step 4: Simplify right side
    308,497.20x = 73,449,839,604.35
  5. Step 5: Solve for x
    x = 73,449,839,604.35/308,497.20
  6. Step 6: Final answer
    x = 238,089.16

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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.