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Finding the Fourth Proportional to 720.27, 994.28 and 487.53

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Solution

The fourth proportional to 720.27, 994.28 and 487.53 is: 673.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.27 : 994.28 = 487.53 : x
  2. Step 2: Convert to fraction form
    720.27/994.28 = 487.53/x
  3. Step 3: Cross multiply
    720.27x = 994.28 × 487.53
  4. Step 4: Simplify right side
    720.27x = 484,738.89
  5. Step 5: Solve for x
    x = 484,738.89/720.27
  6. Step 6: Final answer
    x = 673.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.