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Finding the Fourth Proportional to 308,467.09, 425,681.64 and 172,499.47

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Solution

The fourth proportional to 308,467.09, 425,681.64 and 172,499.47 is: 238,047.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,467.09 : 425,681.64 = 172,499.47 : x
  2. Step 2: Convert to fraction form
    308,467.09/425,681.64 = 172,499.47/x
  3. Step 3: Cross multiply
    308,467.09x = 425,681.64 × 172,499.47
  4. Step 4: Simplify right side
    308,467.09x = 73,429,857,288.73
  5. Step 5: Solve for x
    x = 73,429,857,288.73/308,467.09
  6. Step 6: Final answer
    x = 238,047.62

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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.