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Finding the Fourth Proportional to 326,485.92, 489,671.52 and 89,771.52

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Solution

The fourth proportional to 326,485.92, 489,671.52 and 89,771.52 is: 134,641.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,485.92 : 489,671.52 = 89,771.52 : x
  2. Step 2: Convert to fraction form
    326,485.92/489,671.52 = 89,771.52/x
  3. Step 3: Cross multiply
    326,485.92x = 489,671.52 × 89,771.52
  4. Step 4: Simplify right side
    326,485.92x = 43,958,556,651.11
  5. Step 5: Solve for x
    x = 43,958,556,651.11/326,485.92
  6. Step 6: Final answer
    x = 134,641.51

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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.