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Finding the Fourth Proportional to 379,615.45, 523,844.40 and 218,444.50

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Solution

The fourth proportional to 379,615.45, 523,844.40 and 218,444.50 is: 301,439.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,615.45 : 523,844.40 = 218,444.50 : x
  2. Step 2: Convert to fraction form
    379,615.45/523,844.40 = 218,444.50/x
  3. Step 3: Cross multiply
    379,615.45x = 523,844.40 × 218,444.50
  4. Step 4: Simplify right side
    379,615.45x = 114,430,928,035.80
  5. Step 5: Solve for x
    x = 114,430,928,035.80/379,615.45
  6. Step 6: Final answer
    x = 301,439.07

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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.