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Finding the Fourth Proportional to 321,202.15, 481,803.23 and 215,448.55

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Solution

The fourth proportional to 321,202.15, 481,803.23 and 215,448.55 is: 323,172.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,202.15 : 481,803.23 = 215,448.55 : x
  2. Step 2: Convert to fraction form
    321,202.15/481,803.23 = 215,448.55/x
  3. Step 3: Cross multiply
    321,202.15x = 481,803.23 × 215,448.55
  4. Step 4: Simplify right side
    321,202.15x = 103,803,806,211.57
  5. Step 5: Solve for x
    x = 103,803,806,211.57/321,202.15
  6. Step 6: Final answer
    x = 323,172.83

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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.