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Finding the Fourth Proportional to 307,382.90, 424,190.86 and 171,425.61

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Solution

The fourth proportional to 307,382.90, 424,190.86 and 171,425.61 is: 236,568.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,382.90 : 424,190.86 = 171,425.61 : x
  2. Step 2: Convert to fraction form
    307,382.90/424,190.86 = 171,425.61/x
  3. Step 3: Cross multiply
    307,382.90x = 424,190.86 × 171,425.61
  4. Step 4: Simplify right side
    307,382.90x = 72,717,176,503.36
  5. Step 5: Solve for x
    x = 72,717,176,503.36/307,382.90
  6. Step 6: Final answer
    x = 236,568.72

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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.