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Finding the Fourth Proportional to 720.54, 993.96 and 471.60

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Solution

The fourth proportional to 720.54, 993.96 and 471.60 is: 650.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.54 : 993.96 = 471.60 : x
  2. Step 2: Convert to fraction form
    720.54/993.96 = 471.60/x
  3. Step 3: Cross multiply
    720.54x = 993.96 × 471.60
  4. Step 4: Simplify right side
    720.54x = 468,751.54
  5. Step 5: Solve for x
    x = 468,751.54/720.54
  6. Step 6: Final answer
    x = 650.56

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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.