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Finding the Fourth Proportional to 679.47, 1,017.63 and 496.41

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Solution

The fourth proportional to 679.47, 1,017.63 and 496.41 is: 743.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.47 : 1,017.63 = 496.41 : x
  2. Step 2: Convert to fraction form
    679.47/1,017.63 = 496.41/x
  3. Step 3: Cross multiply
    679.47x = 1,017.63 × 496.41
  4. Step 4: Simplify right side
    679.47x = 505,157.89
  5. Step 5: Solve for x
    x = 505,157.89/679.47
  6. Step 6: Final answer
    x = 743.46

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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.