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Finding the Fourth Proportional to 720.22, 993.57 and 440.23

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Solution

The fourth proportional to 720.22, 993.57 and 440.23 is: 607.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.22 : 993.57 = 440.23 : x
  2. Step 2: Convert to fraction form
    720.22/993.57 = 440.23/x
  3. Step 3: Cross multiply
    720.22x = 993.57 × 440.23
  4. Step 4: Simplify right side
    720.22x = 437,399.32
  5. Step 5: Solve for x
    x = 437,399.32/720.22
  6. Step 6: Final answer
    x = 607.31

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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.