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Finding the Fourth Proportional to 755.63, 1,134.39 and 447.69

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Solution

The fourth proportional to 755.63, 1,134.39 and 447.69 is: 672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.63 : 1,134.39 = 447.69 : x
  2. Step 2: Convert to fraction form
    755.63/1,134.39 = 447.69/x
  3. Step 3: Cross multiply
    755.63x = 1,134.39 × 447.69
  4. Step 4: Simplify right side
    755.63x = 507,855.06
  5. Step 5: Solve for x
    x = 507,855.06/755.63
  6. Step 6: Final answer
    x = 672.10

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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.