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Finding the Fourth Proportional to 755.34, 1,133.01 and 389.35

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Solution

The fourth proportional to 755.34, 1,133.01 and 389.35 is: 584.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.34 : 1,133.01 = 389.35 : x
  2. Step 2: Convert to fraction form
    755.34/1,133.01 = 389.35/x
  3. Step 3: Cross multiply
    755.34x = 1,133.01 × 389.35
  4. Step 4: Simplify right side
    755.34x = 441,138.86
  5. Step 5: Solve for x
    x = 441,138.86/755.34
  6. Step 6: Final answer
    x = 584.03

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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.