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Finding the Fourth Proportional to 800.53, 1,199.91 and 338.59

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Solution

The fourth proportional to 800.53, 1,199.91 and 338.59 is: 507.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.53 : 1,199.91 = 338.59 : x
  2. Step 2: Convert to fraction form
    800.53/1,199.91 = 338.59/x
  3. Step 3: Cross multiply
    800.53x = 1,199.91 × 338.59
  4. Step 4: Simplify right side
    800.53x = 406,277.53
  5. Step 5: Solve for x
    x = 406,277.53/800.53
  6. Step 6: Final answer
    x = 507.51

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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.