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Finding the Fourth Proportional to 326,400.64, 489,305.71 and 115,989.37

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Solution

The fourth proportional to 326,400.64, 489,305.71 and 115,989.37 is: 173,879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,400.64 : 489,305.71 = 115,989.37 : x
  2. Step 2: Convert to fraction form
    326,400.64/489,305.71 = 115,989.37/x
  3. Step 3: Cross multiply
    326,400.64x = 489,305.71 × 115,989.37
  4. Step 4: Simplify right side
    326,400.64x = 56,754,259,962.03
  5. Step 5: Solve for x
    x = 56,754,259,962.03/326,400.64
  6. Step 6: Final answer
    x = 173,879.13

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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.