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Finding the Fourth Proportional to 753.32, 1,128.34 and 367.76

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Solution

The fourth proportional to 753.32, 1,128.34 and 367.76 is: 550.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.32 : 1,128.34 = 367.76 : x
  2. Step 2: Convert to fraction form
    753.32/1,128.34 = 367.76/x
  3. Step 3: Cross multiply
    753.32x = 1,128.34 × 367.76
  4. Step 4: Simplify right side
    753.32x = 414,958.32
  5. Step 5: Solve for x
    x = 414,958.32/753.32
  6. Step 6: Final answer
    x = 550.84

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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.