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Finding the Fourth Proportional to 321,203.40, 481,805.10 and 215,449.80

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Solution

The fourth proportional to 321,203.40, 481,805.10 and 215,449.80 is: 323,174.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,203.40 : 481,805.10 = 215,449.80 : x
  2. Step 2: Convert to fraction form
    321,203.40/481,805.10 = 215,449.80/x
  3. Step 3: Cross multiply
    321,203.40x = 481,805.10 × 215,449.80
  4. Step 4: Simplify right side
    321,203.40x = 103,804,812,433.98
  5. Step 5: Solve for x
    x = 103,804,812,433.98/321,203.40
  6. Step 6: Final answer
    x = 323,174.70

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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.