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Finding the Fourth Proportional to 521.63, 719.85 and 300.57

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Solution

The fourth proportional to 521.63, 719.85 and 300.57 is: 414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.63 : 719.85 = 300.57 : x
  2. Step 2: Convert to fraction form
    521.63/719.85 = 300.57/x
  3. Step 3: Cross multiply
    521.63x = 719.85 × 300.57
  4. Step 4: Simplify right side
    521.63x = 216,365.31
  5. Step 5: Solve for x
    x = 216,365.31/521.63
  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.