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Finding the Fourth Proportional to 720.32, 993.36 and 440.60

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Solution

The fourth proportional to 720.32, 993.36 and 440.60 is: 607.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.32 : 993.36 = 440.60 : x
  2. Step 2: Convert to fraction form
    720.32/993.36 = 440.60/x
  3. Step 3: Cross multiply
    720.32x = 993.36 × 440.60
  4. Step 4: Simplify right side
    720.32x = 437,674.42
  5. Step 5: Solve for x
    x = 437,674.42/720.32
  6. Step 6: Final answer
    x = 607.61

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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.