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Finding the Fourth Proportional to 308,165.80, 425,260.64 and 172,200.87

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Solution

The fourth proportional to 308,165.80, 425,260.64 and 172,200.87 is: 237,632.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,165.80 : 425,260.64 = 172,200.87 : x
  2. Step 2: Convert to fraction form
    308,165.80/425,260.64 = 172,200.87/x
  3. Step 3: Cross multiply
    308,165.80x = 425,260.64 × 172,200.87
  4. Step 4: Simplify right side
    308,165.80x = 73,230,251,323.75
  5. Step 5: Solve for x
    x = 73,230,251,323.75/308,165.80
  6. Step 6: Final answer
    x = 237,632.64

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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.