Home / 326,780.20-490,170.30-139,810.60

Finding the Fourth Proportional to 326,780.20, 490,170.30 and 139,810.60

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Solution

The fourth proportional to 326,780.20, 490,170.30 and 139,810.60 is: 209,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,780.20 : 490,170.30 = 139,810.60 : x
  2. Step 2: Convert to fraction form
    326,780.20/490,170.30 = 139,810.60/x
  3. Step 3: Cross multiply
    326,780.20x = 490,170.30 × 139,810.60
  4. Step 4: Simplify right side
    326,780.20x = 68,531,003,745.18
  5. Step 5: Solve for x
    x = 68,531,003,745.18/326,780.20
  6. Step 6: Final answer
    x = 209,715.90

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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.