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Finding the Fourth Proportional to 753.93, 1,040.25 and 459

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Solution

The fourth proportional to 753.93, 1,040.25 and 459 is: 633.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.93 : 1,040.25 = 459 : x
  2. Step 2: Convert to fraction form
    753.93/1,040.25 = 459/x
  3. Step 3: Cross multiply
    753.93x = 1,040.25 × 459
  4. Step 4: Simplify right side
    753.93x = 477,474.75
  5. Step 5: Solve for x
    x = 477,474.75/753.93
  6. Step 6: Final answer
    x = 633.31

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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.