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Finding the Fourth Proportional to 308,406.48, 425,601.64 and 172,445.36

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Solution

The fourth proportional to 308,406.48, 425,601.64 and 172,445.36 is: 237,974.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,406.48 : 425,601.64 = 172,445.36 : x
  2. Step 2: Convert to fraction form
    308,406.48/425,601.64 = 172,445.36/x
  3. Step 3: Cross multiply
    308,406.48x = 425,601.64 × 172,445.36
  4. Step 4: Simplify right side
    308,406.48x = 73,393,028,026.39
  5. Step 5: Solve for x
    x = 73,393,028,026.39/308,406.48
  6. Step 6: Final answer
    x = 237,974.99

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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.