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Finding the Fourth Proportional to 521.11, 719.29 and 300.22

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Solution

The fourth proportional to 521.11, 719.29 and 300.22 is: 414.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.11 : 719.29 = 300.22 : x
  2. Step 2: Convert to fraction form
    521.11/719.29 = 300.22/x
  3. Step 3: Cross multiply
    521.11x = 719.29 × 300.22
  4. Step 4: Simplify right side
    521.11x = 215,942.70
  5. Step 5: Solve for x
    x = 215,942.70/521.11
  6. Step 6: Final answer
    x = 414.39

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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.