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Finding the Fourth Proportional to 720.12, 993.74 and 440.37

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Solution

The fourth proportional to 720.12, 993.74 and 440.37 is: 607.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.12 : 993.74 = 440.37 : x
  2. Step 2: Convert to fraction form
    720.12/993.74 = 440.37/x
  3. Step 3: Cross multiply
    720.12x = 993.74 × 440.37
  4. Step 4: Simplify right side
    720.12x = 437,607.21
  5. Step 5: Solve for x
    x = 437,607.21/720.12
  6. Step 6: Final answer
    x = 607.69

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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.