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Finding the Fourth Proportional to 308,355.91, 425,540.54 and 172,395.59

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Solution

The fourth proportional to 308,355.91, 425,540.54 and 172,395.59 is: 237,911.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,355.91 : 425,540.54 = 172,395.59 : x
  2. Step 2: Convert to fraction form
    308,355.91/425,540.54 = 172,395.59/x
  3. Step 3: Cross multiply
    308,355.91x = 425,540.54 × 172,395.59
  4. Step 4: Simplify right side
    308,355.91x = 73,361,312,189.45
  5. Step 5: Solve for x
    x = 73,361,312,189.45/308,355.91
  6. Step 6: Final answer
    x = 237,911.16

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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.