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Finding the Fourth Proportional to 426,405.96, 639,472.86 and 173,685.96

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Solution

The fourth proportional to 426,405.96, 639,472.86 and 173,685.96 is: 260,473.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,405.96 : 639,472.86 = 173,685.96 : x
  2. Step 2: Convert to fraction form
    426,405.96/639,472.86 = 173,685.96/x
  3. Step 3: Cross multiply
    426,405.96x = 639,472.86 × 173,685.96
  4. Step 4: Simplify right side
    426,405.96x = 111,067,457,583.05
  5. Step 5: Solve for x
    x = 111,067,457,583.05/426,405.96
  6. Step 6: Final answer
    x = 260,473.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.