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Finding the Fourth Proportional to 387,385.22, 580,745.03 and 134,632.87

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Solution

The fourth proportional to 387,385.22, 580,745.03 and 134,632.87 is: 201,833.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,385.22 : 580,745.03 = 134,632.87 : x
  2. Step 2: Convert to fraction form
    387,385.22/580,745.03 = 134,632.87/x
  3. Step 3: Cross multiply
    387,385.22x = 580,745.03 × 134,632.87
  4. Step 4: Simplify right side
    387,385.22x = 78,187,368,002.11
  5. Step 5: Solve for x
    x = 78,187,368,002.11/387,385.22
  6. Step 6: Final answer
    x = 201,833.64

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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.