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Finding the Fourth Proportional to 679.04, 1,016.33 and 515.82

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Solution

The fourth proportional to 679.04, 1,016.33 and 515.82 is: 772.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.04 : 1,016.33 = 515.82 : x
  2. Step 2: Convert to fraction form
    679.04/1,016.33 = 515.82/x
  3. Step 3: Cross multiply
    679.04x = 1,016.33 × 515.82
  4. Step 4: Simplify right side
    679.04x = 524,240.76
  5. Step 5: Solve for x
    x = 524,240.76/679.04
  6. Step 6: Final answer
    x = 772.04

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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.