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Finding the Fourth Proportional to 521.11, 719.18 and 300.07

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Solution

The fourth proportional to 521.11, 719.18 and 300.07 is: 414.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.11 : 719.18 = 300.07 : x
  2. Step 2: Convert to fraction form
    521.11/719.18 = 300.07/x
  3. Step 3: Cross multiply
    521.11x = 719.18 × 300.07
  4. Step 4: Simplify right side
    521.11x = 215,804.34
  5. Step 5: Solve for x
    x = 215,804.34/521.11
  6. Step 6: Final answer
    x = 414.12

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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.