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Finding the Fourth Proportional to 308,285.82, 425,401.86 and 172,305.45

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Solution

The fourth proportional to 308,285.82, 425,401.86 and 172,305.45 is: 237,763.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,285.82 : 425,401.86 = 172,305.45 : x
  2. Step 2: Convert to fraction form
    308,285.82/425,401.86 = 172,305.45/x
  3. Step 3: Cross multiply
    308,285.82x = 425,401.86 × 172,305.45
  4. Step 4: Simplify right side
    308,285.82x = 73,299,058,918.14
  5. Step 5: Solve for x
    x = 73,299,058,918.14/308,285.82
  6. Step 6: Final answer
    x = 237,763.32

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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.