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Finding the Fourth Proportional to 754.18, 1,040.99 and 439.52

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Solution

The fourth proportional to 754.18, 1,040.99 and 439.52 is: 606.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.18 : 1,040.99 = 439.52 : x
  2. Step 2: Convert to fraction form
    754.18/1,040.99 = 439.52/x
  3. Step 3: Cross multiply
    754.18x = 1,040.99 × 439.52
  4. Step 4: Simplify right side
    754.18x = 457,528.52
  5. Step 5: Solve for x
    x = 457,528.52/754.18
  6. Step 6: Final answer
    x = 606.66

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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.