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Finding the Fourth Proportional to 754.63, 1,040.35 and 614.54

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Solution

The fourth proportional to 754.63, 1,040.35 and 614.54 is: 847.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.63 : 1,040.35 = 614.54 : x
  2. Step 2: Convert to fraction form
    754.63/1,040.35 = 614.54/x
  3. Step 3: Cross multiply
    754.63x = 1,040.35 × 614.54
  4. Step 4: Simplify right side
    754.63x = 639,336.69
  5. Step 5: Solve for x
    x = 639,336.69/754.63
  6. Step 6: Final answer
    x = 847.22

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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.