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Finding the Fourth Proportional to 308,687.02, 425,995.74 and 172,719.86

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Solution

The fourth proportional to 308,687.02, 425,995.74 and 172,719.86 is: 238,357.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,687.02 : 425,995.74 = 172,719.86 : x
  2. Step 2: Convert to fraction form
    308,687.02/425,995.74 = 172,719.86/x
  3. Step 3: Cross multiply
    308,687.02x = 425,995.74 × 172,719.86
  4. Step 4: Simplify right side
    308,687.02x = 73,577,924,573.40
  5. Step 5: Solve for x
    x = 73,577,924,573.40/308,687.02
  6. Step 6: Final answer
    x = 238,357.69

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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.