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Finding the Fourth Proportional to 308,652.54, 425,957.03 and 172,678.40

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Solution

The fourth proportional to 308,652.54, 425,957.03 and 172,678.40 is: 238,305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,652.54 : 425,957.03 = 172,678.40 : x
  2. Step 2: Convert to fraction form
    308,652.54/425,957.03 = 172,678.40/x
  3. Step 3: Cross multiply
    308,652.54x = 425,957.03 × 172,678.40
  4. Step 4: Simplify right side
    308,652.54x = 73,553,577,660.86
  5. Step 5: Solve for x
    x = 73,553,577,660.86/308,652.54
  6. Step 6: Final answer
    x = 238,305.43

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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.