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Finding the Fourth Proportional to 756.27, 1,134.21 and 208.34

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Solution

The fourth proportional to 756.27, 1,134.21 and 208.34 is: 312.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.27 : 1,134.21 = 208.34 : x
  2. Step 2: Convert to fraction form
    756.27/1,134.21 = 208.34/x
  3. Step 3: Cross multiply
    756.27x = 1,134.21 × 208.34
  4. Step 4: Simplify right side
    756.27x = 236,300.67
  5. Step 5: Solve for x
    x = 236,300.67/756.27
  6. Step 6: Final answer
    x = 312.46

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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.