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Finding the Fourth Proportional to 800.23, 1,200.50 and 338.01

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Solution

The fourth proportional to 800.23, 1,200.50 and 338.01 is: 507.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.23 : 1,200.50 = 338.01 : x
  2. Step 2: Convert to fraction form
    800.23/1,200.50 = 338.01/x
  3. Step 3: Cross multiply
    800.23x = 1,200.50 × 338.01
  4. Step 4: Simplify right side
    800.23x = 405,777.98
  5. Step 5: Solve for x
    x = 405,777.98/800.23
  6. Step 6: Final answer
    x = 507.08

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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.