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Finding the Fourth Proportional to 306,999.72, 423,672.66 and 171,033.58

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Solution

The fourth proportional to 306,999.72, 423,672.66 and 171,033.58 is: 236,033.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,999.72 : 423,672.66 = 171,033.58 : x
  2. Step 2: Convert to fraction form
    306,999.72/423,672.66 = 171,033.58/x
  3. Step 3: Cross multiply
    306,999.72x = 423,672.66 × 171,033.58
  4. Step 4: Simplify right side
    306,999.72x = 72,462,251,787.92
  5. Step 5: Solve for x
    x = 72,462,251,787.92/306,999.72
  6. Step 6: Final answer
    x = 236,033.61

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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.