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Finding the Fourth Proportional to 746.24, 1,119.84 and 421.84

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Solution

The fourth proportional to 746.24, 1,119.84 and 421.84 is: 633.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.24 : 1,119.84 = 421.84 : x
  2. Step 2: Convert to fraction form
    746.24/1,119.84 = 421.84/x
  3. Step 3: Cross multiply
    746.24x = 1,119.84 × 421.84
  4. Step 4: Simplify right side
    746.24x = 472,393.31
  5. Step 5: Solve for x
    x = 472,393.31/746.24
  6. Step 6: Final answer
    x = 633.03

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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.