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Finding the Fourth Proportional to 381,625.32, 572,503.97 and 128,907.65

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Solution

The fourth proportional to 381,625.32, 572,503.97 and 128,907.65 is: 193,383.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,625.32 : 572,503.97 = 128,907.65 : x
  2. Step 2: Convert to fraction form
    381,625.32/572,503.97 = 128,907.65/x
  3. Step 3: Cross multiply
    381,625.32x = 572,503.97 × 128,907.65
  4. Step 4: Simplify right side
    381,625.32x = 73,800,142,416.79
  5. Step 5: Solve for x
    x = 73,800,142,416.79/381,625.32
  6. Step 6: Final answer
    x = 193,383.77

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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.