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Finding the Fourth Proportional to 326,279.74, 489,418.66 and 89,622.65

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Solution

The fourth proportional to 326,279.74, 489,418.66 and 89,622.65 is: 134,433.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,279.74 : 489,418.66 = 89,622.65 : x
  2. Step 2: Convert to fraction form
    326,279.74/489,418.66 = 89,622.65/x
  3. Step 3: Cross multiply
    326,279.74x = 489,418.66 × 89,622.65
  4. Step 4: Simplify right side
    326,279.74x = 43,862,994,373.44
  5. Step 5: Solve for x
    x = 43,862,994,373.44/326,279.74
  6. Step 6: Final answer
    x = 134,433.71

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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.