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Finding the Fourth Proportional to 318,105.63, 438,991.25 and 174,871.71

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Solution

The fourth proportional to 318,105.63, 438,991.25 and 174,871.71 is: 241,325.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,105.63 : 438,991.25 = 174,871.71 : x
  2. Step 2: Convert to fraction form
    318,105.63/438,991.25 = 174,871.71/x
  3. Step 3: Cross multiply
    318,105.63x = 438,991.25 × 174,871.71
  4. Step 4: Simplify right side
    318,105.63x = 76,767,149,688.18
  5. Step 5: Solve for x
    x = 76,767,149,688.18/318,105.63
  6. Step 6: Final answer
    x = 241,325.97

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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.