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Finding the Fourth Proportional to 326,858.49, 490,315.95 and 90,201.15

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Solution

The fourth proportional to 326,858.49, 490,315.95 and 90,201.15 is: 135,309.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,858.49 : 490,315.95 = 90,201.15 : x
  2. Step 2: Convert to fraction form
    326,858.49/490,315.95 = 90,201.15/x
  3. Step 3: Cross multiply
    326,858.49x = 490,315.95 × 90,201.15
  4. Step 4: Simplify right side
    326,858.49x = 44,227,062,553.34
  5. Step 5: Solve for x
    x = 44,227,062,553.34/326,858.49
  6. Step 6: Final answer
    x = 135,309.51

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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.