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Finding the Fourth Proportional to 381,341.52, 571,886.73 and 128,553.75

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Solution

The fourth proportional to 381,341.52, 571,886.73 and 128,553.75 is: 192,788.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,341.52 : 571,886.73 = 128,553.75 : x
  2. Step 2: Convert to fraction form
    381,341.52/571,886.73 = 128,553.75/x
  3. Step 3: Cross multiply
    381,341.52x = 571,886.73 × 128,553.75
  4. Step 4: Simplify right side
    381,341.52x = 73,518,183,716.74
  5. Step 5: Solve for x
    x = 73,518,183,716.74/381,341.52
  6. Step 6: Final answer
    x = 192,788.30

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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.