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Finding the Fourth Proportional to 549.15, 756.84 and 455.39

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Solution

The fourth proportional to 549.15, 756.84 and 455.39 is: 627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.15 : 756.84 = 455.39 : x
  2. Step 2: Convert to fraction form
    549.15/756.84 = 455.39/x
  3. Step 3: Cross multiply
    549.15x = 756.84 × 455.39
  4. Step 4: Simplify right side
    549.15x = 344,658.13
  5. Step 5: Solve for x
    x = 344,658.13/549.15
  6. Step 6: Final answer
    x = 627.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.