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Finding the Fourth Proportional to 323,489.02, 485,323.53 and 141,135.78

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Solution

The fourth proportional to 323,489.02, 485,323.53 and 141,135.78 is: 211,742.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,489.02 : 485,323.53 = 141,135.78 : x
  2. Step 2: Convert to fraction form
    323,489.02/485,323.53 = 141,135.78/x
  3. Step 3: Cross multiply
    323,489.02x = 485,323.53 × 141,135.78
  4. Step 4: Simplify right side
    323,489.02x = 68,496,514,253.22
  5. Step 5: Solve for x
    x = 68,496,514,253.22/323,489.02
  6. Step 6: Final answer
    x = 211,742.93

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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.