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Finding the Fourth Proportional to 720.26, 993.30 and 554.48

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Solution

The fourth proportional to 720.26, 993.30 and 554.48 is: 764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.26 : 993.30 = 554.48 : x
  2. Step 2: Convert to fraction form
    720.26/993.30 = 554.48/x
  3. Step 3: Cross multiply
    720.26x = 993.30 × 554.48
  4. Step 4: Simplify right side
    720.26x = 550,764.98
  5. Step 5: Solve for x
    x = 550,764.98/720.26
  6. Step 6: Final answer
    x = 764.68

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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.