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Finding the Fourth Proportional to 756.59, 1,134.74 and 208.64

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Solution

The fourth proportional to 756.59, 1,134.74 and 208.64 is: 312.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.59 : 1,134.74 = 208.64 : x
  2. Step 2: Convert to fraction form
    756.59/1,134.74 = 208.64/x
  3. Step 3: Cross multiply
    756.59x = 1,134.74 × 208.64
  4. Step 4: Simplify right side
    756.59x = 236,745.44
  5. Step 5: Solve for x
    x = 236,745.44/756.59
  6. Step 6: Final answer
    x = 312.91

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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.