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Finding the Fourth Proportional to 308,338.25, 425,509.93 and 172,379.75

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Solution

The fourth proportional to 308,338.25, 425,509.93 and 172,379.75 is: 237,885.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,338.25 : 425,509.93 = 172,379.75 : x
  2. Step 2: Convert to fraction form
    308,338.25/425,509.93 = 172,379.75/x
  3. Step 3: Cross multiply
    308,338.25x = 425,509.93 × 172,379.75
  4. Step 4: Simplify right side
    308,338.25x = 73,349,293,928.66
  5. Step 5: Solve for x
    x = 73,349,293,928.66/308,338.25
  6. Step 6: Final answer
    x = 237,885.81

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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.