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Finding the Fourth Proportional to 655.63, 981.61 and 449.89

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Solution

The fourth proportional to 655.63, 981.61 and 449.89 is: 673.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.63 : 981.61 = 449.89 : x
  2. Step 2: Convert to fraction form
    655.63/981.61 = 449.89/x
  3. Step 3: Cross multiply
    655.63x = 981.61 × 449.89
  4. Step 4: Simplify right side
    655.63x = 441,612.94
  5. Step 5: Solve for x
    x = 441,612.94/655.63
  6. Step 6: Final answer
    x = 673.57

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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.