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Finding the Fourth Proportional to 326,914.68, 490,371.30 and 87,028.64

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Solution

The fourth proportional to 326,914.68, 490,371.30 and 87,028.64 is: 130,542.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,914.68 : 490,371.30 = 87,028.64 : x
  2. Step 2: Convert to fraction form
    326,914.68/490,371.30 = 87,028.64/x
  3. Step 3: Cross multiply
    326,914.68x = 490,371.30 × 87,028.64
  4. Step 4: Simplify right side
    326,914.68x = 42,676,344,882.18
  5. Step 5: Solve for x
    x = 42,676,344,882.18/326,914.68
  6. Step 6: Final answer
    x = 130,542.76

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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.