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Finding the Fourth Proportional to 381,124.56, 525,913.96 and 220,031.60

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Solution

The fourth proportional to 381,124.56, 525,913.96 and 220,031.60 is: 303,621.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,124.56 : 525,913.96 = 220,031.60 : x
  2. Step 2: Convert to fraction form
    381,124.56/525,913.96 = 220,031.60/x
  3. Step 3: Cross multiply
    381,124.56x = 525,913.96 × 220,031.60
  4. Step 4: Simplify right side
    381,124.56x = 115,717,690,081.14
  5. Step 5: Solve for x
    x = 115,717,690,081.14/381,124.56
  6. Step 6: Final answer
    x = 303,621.71

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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.