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Finding the Fourth Proportional to 746.94, 1,119.93 and 422.46

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Solution

The fourth proportional to 746.94, 1,119.93 and 422.46 is: 633.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.94 : 1,119.93 = 422.46 : x
  2. Step 2: Convert to fraction form
    746.94/1,119.93 = 422.46/x
  3. Step 3: Cross multiply
    746.94x = 1,119.93 × 422.46
  4. Step 4: Simplify right side
    746.94x = 473,125.63
  5. Step 5: Solve for x
    x = 473,125.63/746.94
  6. Step 6: Final answer
    x = 633.42

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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.