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Finding the Fourth Proportional to 318,105.87, 438,996.20 and 174,871.95

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Solution

The fourth proportional to 318,105.87, 438,996.20 and 174,871.95 is: 241,328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,105.87 : 438,996.20 = 174,871.95 : x
  2. Step 2: Convert to fraction form
    318,105.87/438,996.20 = 174,871.95/x
  3. Step 3: Cross multiply
    318,105.87x = 438,996.20 × 174,871.95
  4. Step 4: Simplify right side
    318,105.87x = 76,768,119,778.79
  5. Step 5: Solve for x
    x = 76,768,119,778.79/318,105.87
  6. Step 6: Final answer
    x = 241,328.84

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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.