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Finding the Fourth Proportional to 720.50, 994.31 and 440.85

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Solution

The fourth proportional to 720.50, 994.31 and 440.85 is: 608.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.50 : 994.31 = 440.85 : x
  2. Step 2: Convert to fraction form
    720.50/994.31 = 440.85/x
  3. Step 3: Cross multiply
    720.50x = 994.31 × 440.85
  4. Step 4: Simplify right side
    720.50x = 438,344.74
  5. Step 5: Solve for x
    x = 438,344.74/720.50
  6. Step 6: Final answer
    x = 608.39

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Half scale
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Double scale
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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.