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Finding the Fourth Proportional to 308,454.23, 425,663.92 and 172,486.62

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Solution

The fourth proportional to 308,454.23, 425,663.92 and 172,486.62 is: 238,029.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,454.23 : 425,663.92 = 172,486.62 : x
  2. Step 2: Convert to fraction form
    308,454.23/425,663.92 = 172,486.62/x
  3. Step 3: Cross multiply
    308,454.23x = 425,663.92 × 172,486.62
  4. Step 4: Simplify right side
    308,454.23x = 73,421,330,816.75
  5. Step 5: Solve for x
    x = 73,421,330,816.75/308,454.23
  6. Step 6: Final answer
    x = 238,029.90

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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.