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Finding the Fourth Proportional to 321,069.90, 443,374.29 and 240,357.30

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Solution

The fourth proportional to 321,069.90, 443,374.29 and 240,357.30 is: 331,916.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,069.90 : 443,374.29 = 240,357.30 : x
  2. Step 2: Convert to fraction form
    321,069.90/443,374.29 = 240,357.30/x
  3. Step 3: Cross multiply
    321,069.90x = 443,374.29 × 240,357.30
  4. Step 4: Simplify right side
    321,069.90x = 106,568,247,233.82
  5. Step 5: Solve for x
    x = 106,568,247,233.82/321,069.90
  6. Step 6: Final answer
    x = 331,916.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.