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Finding the Fourth Proportional to 754.86, 1,131.84 and 447.06

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Solution

The fourth proportional to 754.86, 1,131.84 and 447.06 is: 670.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.86 : 1,131.84 = 447.06 : x
  2. Step 2: Convert to fraction form
    754.86/1,131.84 = 447.06/x
  3. Step 3: Cross multiply
    754.86x = 1,131.84 × 447.06
  4. Step 4: Simplify right side
    754.86x = 506,000.39
  5. Step 5: Solve for x
    x = 506,000.39/754.86
  6. Step 6: Final answer
    x = 670.32

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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.