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Finding the Fourth Proportional to 720.80, 994.78 and 441.22

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Solution

The fourth proportional to 720.80, 994.78 and 441.22 is: 608.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.80 : 994.78 = 441.22 : x
  2. Step 2: Convert to fraction form
    720.80/994.78 = 441.22/x
  3. Step 3: Cross multiply
    720.80x = 994.78 × 441.22
  4. Step 4: Simplify right side
    720.80x = 438,916.83
  5. Step 5: Solve for x
    x = 438,916.83/720.80
  6. Step 6: Final answer
    x = 608.93

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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.