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Finding the Fourth Proportional to 323,639.52, 485,412.42 and 98,939.64

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Solution

The fourth proportional to 323,639.52, 485,412.42 and 98,939.64 is: 148,395.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,639.52 : 485,412.42 = 98,939.64 : x
  2. Step 2: Convert to fraction form
    323,639.52/485,412.42 = 98,939.64/x
  3. Step 3: Cross multiply
    323,639.52x = 485,412.42 × 98,939.64
  4. Step 4: Simplify right side
    323,639.52x = 48,026,530,086.33
  5. Step 5: Solve for x
    x = 48,026,530,086.33/323,639.52
  6. Step 6: Final answer
    x = 148,395.13

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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.