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Finding the Fourth Proportional to 326,091.80, 489,137.70 and 231,613.40

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Solution

The fourth proportional to 326,091.80, 489,137.70 and 231,613.40 is: 347,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,091.80 : 489,137.70 = 231,613.40 : x
  2. Step 2: Convert to fraction form
    326,091.80/489,137.70 = 231,613.40/x
  3. Step 3: Cross multiply
    326,091.80x = 489,137.70 × 231,613.40
  4. Step 4: Simplify right side
    326,091.80x = 113,290,845,765.18
  5. Step 5: Solve for x
    x = 113,290,845,765.18/326,091.80
  6. Step 6: Final answer
    x = 347,420.10

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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.