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Finding the Fourth Proportional to 619,624.92, 855,627.66 and 387,449.76

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Solution

The fourth proportional to 619,624.92, 855,627.66 and 387,449.76 is: 535,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,624.92 : 855,627.66 = 387,449.76 : x
  2. Step 2: Convert to fraction form
    619,624.92/855,627.66 = 387,449.76/x
  3. Step 3: Cross multiply
    619,624.92x = 855,627.66 × 387,449.76
  4. Step 4: Simplify right side
    619,624.92x = 331,512,731,516.36
  5. Step 5: Solve for x
    x = 331,512,731,516.36/619,624.92
  6. Step 6: Final answer
    x = 535,021.62

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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.