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Finding the Fourth Proportional to 756.63, 1,043.68 and 494.64

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Solution

The fourth proportional to 756.63, 1,043.68 and 494.64 is: 682.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.63 : 1,043.68 = 494.64 : x
  2. Step 2: Convert to fraction form
    756.63/1,043.68 = 494.64/x
  3. Step 3: Cross multiply
    756.63x = 1,043.68 × 494.64
  4. Step 4: Simplify right side
    756.63x = 516,245.88
  5. Step 5: Solve for x
    x = 516,245.88/756.63
  6. Step 6: Final answer
    x = 682.30

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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.