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Finding the Fourth Proportional to 326,091.40, 489,137.10 and 220,337.80

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Solution

The fourth proportional to 326,091.40, 489,137.10 and 220,337.80 is: 330,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,091.40 : 489,137.10 = 220,337.80 : x
  2. Step 2: Convert to fraction form
    326,091.40/489,137.10 = 220,337.80/x
  3. Step 3: Cross multiply
    326,091.40x = 489,137.10 × 220,337.80
  4. Step 4: Simplify right side
    326,091.40x = 107,775,392,512.38
  5. Step 5: Solve for x
    x = 107,775,392,512.38/326,091.40
  6. Step 6: Final answer
    x = 330,506.70

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1.5x scale

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.