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Finding the Fourth Proportional to 720.06, 994.15 and 553.96

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Solution

The fourth proportional to 720.06, 994.15 and 553.96 is: 764.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.06 : 994.15 = 553.96 : x
  2. Step 2: Convert to fraction form
    720.06/994.15 = 553.96/x
  3. Step 3: Cross multiply
    720.06x = 994.15 × 553.96
  4. Step 4: Simplify right side
    720.06x = 550,719.33
  5. Step 5: Solve for x
    x = 550,719.33/720.06
  6. Step 6: Final answer
    x = 764.82

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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.