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Finding the Fourth Proportional to 521.50, 719.73 and 300.51

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Solution

The fourth proportional to 521.50, 719.73 and 300.51 is: 414.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.50 : 719.73 = 300.51 : x
  2. Step 2: Convert to fraction form
    521.50/719.73 = 300.51/x
  3. Step 3: Cross multiply
    521.50x = 719.73 × 300.51
  4. Step 4: Simplify right side
    521.50x = 216,286.06
  5. Step 5: Solve for x
    x = 216,286.06/521.50
  6. Step 6: Final answer
    x = 414.74

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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.