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Finding the Fourth Proportional to 720.22, 993.85 and 440.54

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Solution

The fourth proportional to 720.22, 993.85 and 440.54 is: 607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.22 : 993.85 = 440.54 : x
  2. Step 2: Convert to fraction form
    720.22/993.85 = 440.54/x
  3. Step 3: Cross multiply
    720.22x = 993.85 × 440.54
  4. Step 4: Simplify right side
    720.22x = 437,825.71
  5. Step 5: Solve for x
    x = 437,825.71/720.22
  6. Step 6: Final answer
    x = 607.91

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1.5x scale

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.