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Finding the Fourth Proportional to 756.18, 1,134.33 and 208.41

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Solution

The fourth proportional to 756.18, 1,134.33 and 208.41 is: 312.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.18 : 1,134.33 = 208.41 : x
  2. Step 2: Convert to fraction form
    756.18/1,134.33 = 208.41/x
  3. Step 3: Cross multiply
    756.18x = 1,134.33 × 208.41
  4. Step 4: Simplify right side
    756.18x = 236,405.72
  5. Step 5: Solve for x
    x = 236,405.72/756.18
  6. Step 6: Final answer
    x = 312.63

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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.