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Finding the Fourth Proportional to 310,861.39, 428,988.62 and 173,037.33

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Solution

The fourth proportional to 310,861.39, 428,988.62 and 173,037.33 is: 238,791.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,861.39 : 428,988.62 = 173,037.33 : x
  2. Step 2: Convert to fraction form
    310,861.39/428,988.62 = 173,037.33/x
  3. Step 3: Cross multiply
    310,861.39x = 428,988.62 × 173,037.33
  4. Step 4: Simplify right side
    310,861.39x = 74,231,042,827.65
  5. Step 5: Solve for x
    x = 74,231,042,827.65/310,861.39
  6. Step 6: Final answer
    x = 238,791.45

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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.