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Finding the Fourth Proportional to 308,661.60, 425,969.58 and 172,687.44

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Solution

The fourth proportional to 308,661.60, 425,969.58 and 172,687.44 is: 238,317.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,661.60 : 425,969.58 = 172,687.44 : x
  2. Step 2: Convert to fraction form
    308,661.60/425,969.58 = 172,687.44/x
  3. Step 3: Cross multiply
    308,661.60x = 425,969.58 × 172,687.44
  4. Step 4: Simplify right side
    308,661.60x = 73,559,596,288.08
  5. Step 5: Solve for x
    x = 73,559,596,288.08/308,661.60
  6. Step 6: Final answer
    x = 238,317.94

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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.