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Finding the Fourth Proportional to 308,842.46, 426,209.81 and 172,873.02

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Solution

The fourth proportional to 308,842.46, 426,209.81 and 172,873.02 is: 238,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,842.46 : 426,209.81 = 172,873.02 : x
  2. Step 2: Convert to fraction form
    308,842.46/426,209.81 = 172,873.02/x
  3. Step 3: Cross multiply
    308,842.46x = 426,209.81 × 172,873.02
  4. Step 4: Simplify right side
    308,842.46x = 73,680,176,143.96
  5. Step 5: Solve for x
    x = 73,680,176,143.96/308,842.46
  6. Step 6: Final answer
    x = 238,568.81

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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.