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Finding the Fourth Proportional to 307,999.94, 425,035.40 and 172,035.86

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Solution

The fourth proportional to 307,999.94, 425,035.40 and 172,035.86 is: 237,406.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,999.94 : 425,035.40 = 172,035.86 : x
  2. Step 2: Convert to fraction form
    307,999.94/425,035.40 = 172,035.86/x
  3. Step 3: Cross multiply
    307,999.94x = 425,035.40 × 172,035.86
  4. Step 4: Simplify right side
    307,999.94x = 73,121,327,584.09
  5. Step 5: Solve for x
    x = 73,121,327,584.09/307,999.94
  6. Step 6: Final answer
    x = 237,406.96

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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.