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Finding the Fourth Proportional to 720.28, 994.44 and 471.96

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Solution

The fourth proportional to 720.28, 994.44 and 471.96 is: 651.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.28 : 994.44 = 471.96 : x
  2. Step 2: Convert to fraction form
    720.28/994.44 = 471.96/x
  3. Step 3: Cross multiply
    720.28x = 994.44 × 471.96
  4. Step 4: Simplify right side
    720.28x = 469,335.90
  5. Step 5: Solve for x
    x = 469,335.90/720.28
  6. Step 6: Final answer
    x = 651.60

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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.