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Finding the Fourth Proportional to 381,256.77, 571,889.28 and 115,019.61

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Solution

The fourth proportional to 381,256.77, 571,889.28 and 115,019.61 is: 172,530.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,256.77 : 571,889.28 = 115,019.61 : x
  2. Step 2: Convert to fraction form
    381,256.77/571,889.28 = 115,019.61/x
  3. Step 3: Cross multiply
    381,256.77x = 571,889.28 × 115,019.61
  4. Step 4: Simplify right side
    381,256.77x = 65,778,481,948.78
  5. Step 5: Solve for x
    x = 65,778,481,948.78/381,256.77
  6. Step 6: Final answer
    x = 172,530.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.