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Finding the Fourth Proportional to 308,465.48, 425,679.44 and 172,497.87

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Solution

The fourth proportional to 308,465.48, 425,679.44 and 172,497.87 is: 238,045.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,465.48 : 425,679.44 = 172,497.87 : x
  2. Step 2: Convert to fraction form
    308,465.48/425,679.44 = 172,497.87/x
  3. Step 3: Cross multiply
    308,465.48x = 425,679.44 × 172,497.87
  4. Step 4: Simplify right side
    308,465.48x = 73,428,795,840.30
  5. Step 5: Solve for x
    x = 73,428,795,840.30/308,465.48
  6. Step 6: Final answer
    x = 238,045.42

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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.