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Finding the Fourth Proportional to 326,403.09, 489,251.49 and 136,966.37

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Solution

The fourth proportional to 326,403.09, 489,251.49 and 136,966.37 is: 205,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,403.09 : 489,251.49 = 136,966.37 : x
  2. Step 2: Convert to fraction form
    326,403.09/489,251.49 = 136,966.37/x
  3. Step 3: Cross multiply
    326,403.09x = 489,251.49 × 136,966.37
  4. Step 4: Simplify right side
    326,403.09x = 67,010,998,156.13
  5. Step 5: Solve for x
    x = 67,010,998,156.13/326,403.09
  6. Step 6: Final answer
    x = 205,301.36

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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.