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Finding the Fourth Proportional to 381,632.60, 572,448.90 and 132,339.80

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Solution

The fourth proportional to 381,632.60, 572,448.90 and 132,339.80 is: 198,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,632.60 : 572,448.90 = 132,339.80 : x
  2. Step 2: Convert to fraction form
    381,632.60/572,448.90 = 132,339.80/x
  3. Step 3: Cross multiply
    381,632.60x = 572,448.90 × 132,339.80
  4. Step 4: Simplify right side
    381,632.60x = 75,757,772,936.22
  5. Step 5: Solve for x
    x = 75,757,772,936.22/381,632.60
  6. Step 6: Final answer
    x = 198,509.70

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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.