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Finding the Fourth Proportional to 326,919.43, 490,378.42 and 87,033.39

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Solution

The fourth proportional to 326,919.43, 490,378.42 and 87,033.39 is: 130,549.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,919.43 : 490,378.42 = 87,033.39 : x
  2. Step 2: Convert to fraction form
    326,919.43/490,378.42 = 87,033.39/x
  3. Step 3: Cross multiply
    326,919.43x = 490,378.42 × 87,033.39
  4. Step 4: Simplify right side
    326,919.43x = 42,679,296,275.44
  5. Step 5: Solve for x
    x = 42,679,296,275.44/326,919.43
  6. Step 6: Final answer
    x = 130,549.89

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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.