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Finding the Fourth Proportional to 521.46, 719.79 and 300.50

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Solution

The fourth proportional to 521.46, 719.79 and 300.50 is: 414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.46 : 719.79 = 300.50 : x
  2. Step 2: Convert to fraction form
    521.46/719.79 = 300.50/x
  3. Step 3: Cross multiply
    521.46x = 719.79 × 300.50
  4. Step 4: Simplify right side
    521.46x = 216,294.05
  5. Step 5: Solve for x
    x = 216,294.05/521.46
  6. Step 6: Final answer
    x = 414.79

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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.