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Finding the Fourth Proportional to 326,425.77, 489,285.45 and 136,989

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Solution

The fourth proportional to 326,425.77, 489,285.45 and 136,989 is: 205,335.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,425.77 : 489,285.45 = 136,989 : x
  2. Step 2: Convert to fraction form
    326,425.77/489,285.45 = 136,989/x
  3. Step 3: Cross multiply
    326,425.77x = 489,285.45 × 136,989
  4. Step 4: Simplify right side
    326,425.77x = 67,026,724,510.05
  5. Step 5: Solve for x
    x = 67,026,724,510.05/326,425.77
  6. Step 6: Final answer
    x = 205,335.27

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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.