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Finding the Fourth Proportional to 326,687.40, 489,374.98 and 148,949.92

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Solution

The fourth proportional to 326,687.40, 489,374.98 and 148,949.92 is: 223,125.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,687.40 : 489,374.98 = 148,949.92 : x
  2. Step 2: Convert to fraction form
    326,687.40/489,374.98 = 148,949.92/x
  3. Step 3: Cross multiply
    326,687.40x = 489,374.98 × 148,949.92
  4. Step 4: Simplify right side
    326,687.40x = 72,892,364,121.00
  5. Step 5: Solve for x
    x = 72,892,364,121.00/326,687.40
  6. Step 6: Final answer
    x = 223,125.73

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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.