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Finding the Fourth Proportional to 459.46, 689.19 and 199.59

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Solution

The fourth proportional to 459.46, 689.19 and 199.59 is: 299.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.46 : 689.19 = 199.59 : x
  2. Step 2: Convert to fraction form
    459.46/689.19 = 199.59/x
  3. Step 3: Cross multiply
    459.46x = 689.19 × 199.59
  4. Step 4: Simplify right side
    459.46x = 137,555.43
  5. Step 5: Solve for x
    x = 137,555.43/459.46
  6. Step 6: Final answer
    x = 299.39

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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.