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Finding the Fourth Proportional to 754.93, 1,041.79 and 440.21

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Solution

The fourth proportional to 754.93, 1,041.79 and 440.21 is: 607.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.93 : 1,041.79 = 440.21 : x
  2. Step 2: Convert to fraction form
    754.93/1,041.79 = 440.21/x
  3. Step 3: Cross multiply
    754.93x = 1,041.79 × 440.21
  4. Step 4: Simplify right side
    754.93x = 458,604.54
  5. Step 5: Solve for x
    x = 458,604.54/754.93
  6. Step 6: Final answer
    x = 607.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.