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Finding the Fourth Proportional to 308,662.48, 425,975.34 and 172,709.32

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Solution

The fourth proportional to 308,662.48, 425,975.34 and 172,709.32 is: 238,350.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,662.48 : 425,975.34 = 172,709.32 : x
  2. Step 2: Convert to fraction form
    308,662.48/425,975.34 = 172,709.32/x
  3. Step 3: Cross multiply
    308,662.48x = 425,975.34 × 172,709.32
  4. Step 4: Simplify right side
    308,662.48x = 73,569,911,308.17
  5. Step 5: Solve for x
    x = 73,569,911,308.17/308,662.48
  6. Step 6: Final answer
    x = 238,350.68

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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.